diff --git a/addons/account/static/src/scss/account_dashboard.scss b/addons/account/static/src/scss/account_dashboard.scss
index 50f6f1169a1..531c1cbf06d 100644
--- a/addons/account/static/src/scss/account_dashboard.scss
+++ b/addons/account/static/src/scss/account_dashboard.scss
@@ -29,7 +29,7 @@
             }
         }
 
-        .o_arrow_button.btn-default {
+        .o_arrow_button.btn-secondary {
             color: $text-muted;
             text-transform: none;
             font-weight: 500;
diff --git a/addons/account/static/src/xml/account_dashboard_setup_bar.xml b/addons/account/static/src/xml/account_dashboard_setup_bar.xml
index 44317822c92..bedbb4f2e35 100644
--- a/addons/account/static/src/xml/account_dashboard_setup_bar.xml
+++ b/addons/account/static/src/xml/account_dashboard_setup_bar.xml
@@ -5,22 +5,22 @@
         <div class="o_account_dashboard_header d-none d-md-block o_form_view" t-if="values['show_setup_bar']">
             <div class="o_form_statusbar">
                 <div class="o_statusbar_status" data-original-title="" title="" >
-                    <button name="setting_chart_of_accounts_action" type="company_object" t-attf-class="btn o_arrow_button btn-default account_setup_dashboard_action #{values['chart_of_accounts'] and 'o_action_done' or ''}" >
+                    <button name="setting_chart_of_accounts_action" type="company_object" t-attf-class="btn o_arrow_button btn-secondary account_setup_dashboard_action #{values['chart_of_accounts'] and 'o_action_done' or ''}" >
                         <i class="fa fa-check" t-if="values['chart_of_accounts']" role="img" aria-label="Current state" title="Current state" aria-current="step"/>
                         <b class="o_account_dashboard_index">4</b>
                         Chart of Accounts
                     </button>
-                    <button name="setting_init_fiscal_year_action" type="company_object" t-attf-class="btn o_arrow_button btn-default account_setup_dashboard_action #{values['fiscal_year'] and 'o_action_done' or ''}">
+                    <button name="setting_init_fiscal_year_action" type="company_object" t-attf-class="btn o_arrow_button btn-secondary account_setup_dashboard_action #{values['fiscal_year'] and 'o_action_done' or ''}">
                         <i class="fa fa-check" t-if="values['fiscal_year']" role="img" aria-label="Current state" title="Current state" aria-current="step"/>
                         <b class="o_account_dashboard_index">3</b>
                         Fiscal Year
                     </button>
-                    <button name="setting_init_bank_account_action" type="company_object" t-attf-class="btn o_arrow_button btn-default account_setup_dashboard_action #{values['bank'] and 'o_action_done' or ''}">
+                    <button name="setting_init_bank_account_action" type="company_object" t-attf-class="btn o_arrow_button btn-secondary account_setup_dashboard_action #{values['bank'] and 'o_action_done' or ''}">
                         <i class="fa fa-check" t-if="values['bank']" role="img" aria-label="Current state" title="Current state" aria-current="step"/>
                         <b class="o_account_dashboard_index">2</b>
                         Add a Bank Account
                     </button>
-                    <button name="setting_init_company_action" type="company_object" t-attf-class="btn o_arrow_button btn-default account_setup_dashboard_action #{values['company'] and 'o_action_done' or ''}">
+                    <button name="setting_init_company_action" type="company_object" t-attf-class="btn o_arrow_button btn-secondary account_setup_dashboard_action #{values['company'] and 'o_action_done' or ''}">
                         <i class="fa fa-check" t-if="values['company']" role="img" aria-label="Current state" title="Current state" aria-current="step"/>
                         <b class="o_account_dashboard_index">1</b>
                         Company Data
diff --git a/addons/account/static/src/xml/account_payment.xml b/addons/account/static/src/xml/account_payment.xml
index 27fc4044f24..414d5676442 100644
--- a/addons/account/static/src/xml/account_payment.xml
+++ b/addons/account/static/src/xml/account_payment.xml
@@ -79,7 +79,7 @@
             </table>
         </div>
         <button class="btn btn-xs btn-primary js_unreconcile_payment pull-left" t-att-payment-id="payment_id" style="margin-top:5px; margin-bottom:5px;">Unreconcile</button>
-        <button class="btn btn-xs btn-default js_open_payment pull-right" t-att-payment-id="account_payment_id" t-att-invoice-id="invoice_id" t-att-move-id="move_id" style="margin-top:5px; margin-bottom:5px;">View</button>
+        <button class="btn btn-xs btn-secondary js_open_payment pull-right" t-att-payment-id="account_payment_id" t-att-invoice-id="invoice_id" t-att-move-id="move_id" style="margin-top:5px; margin-bottom:5px;">View</button>
     </t>
 
 </templates>
diff --git a/addons/account/static/src/xml/account_reconciliation.xml b/addons/account/static/src/xml/account_reconciliation.xml
index 76ad700c0af..1c0d535e5bc 100644
--- a/addons/account/static/src/xml/account_reconciliation.xml
+++ b/addons/account/static/src/xml/account_reconciliation.xml
@@ -26,12 +26,12 @@
                 </div>
                 <div aria-valuemin="0" t-att-aria-valuenow="widget._initialState.valuenow" class="progress-bar" role="progressbar" style="width: 0%;" t-att-aria-valuemax="widget._initialState.valuemax"></div>
             </div>
-            <button class="btn btn-default o_automatic_reconciliation pull-right" title="Let odoo try to reconcile entries for the user">Automatic reconciliation</button>
+            <button class="btn btn-secondary o_automatic_reconciliation pull-right" title="Let odoo try to reconcile entries for the user">Automatic reconciliation</button>
             <div class="notification_area"/>
         </div>
         <div class="o_reconciliation_lines"/>
         <div t-if="widget._initialState.valuemax &gt; widget._initialState.defaultDisplayQty">
-            <button class="btn btn-default js_load_more">Load more</button>
+            <button class="btn btn-secondary js_load_more">Load more</button>
         </div>
         <div class="pull-right text-muted">Tip: Hit CTRL-Enter to reconcile all the balanced items in the sheet.</div>
     </div>
@@ -59,7 +59,7 @@
     <t t-if="context &amp;&amp; context.active_model">
         <p t-if="context['active_model'] === 'account.journal' || context['active_model'] === 'account.bank.statement'" class="actions_buttons">
             <t t-if="context.journal_id">
-                <button class="button_back_to_statement btn btn-default" t-att-data_journal_id='context.journal_id'>Go to bank statement(s)</button>
+                <button class="button_back_to_statement btn btn-secondary" t-att-data_journal_id='context.journal_id'>Go to bank statement(s)</button>
             </t>
             <t t-if="context['active_model'] === 'account.bank.statement'">
                 <button class="button_close_statement btn btn-primary" style="display: inline-block;">Close statement</button>
@@ -74,7 +74,7 @@
         <table class="accounting_view">
             <caption>
                 <div class="pull-right o_buttons">
-                    <button t-attf-class="o_validate btn btn-default #{!state.balance.type ? '' : 'd-none'}">Validate</button>
+                    <button t-attf-class="o_validate btn btn-secondary #{!state.balance.type ? '' : 'd-none'}">Validate</button>
                     <button t-attf-class="o_reconcile btn btn-primary #{state.balance.type &gt; 0 ? '' : 'd-none'}">Reconcile</button>
                     <span t-attf-class="o_no_valid text-danger #{state.balance.type &lt; 0 ? '' : 'd-none'}">Select a partner or choose a counterpart</span>
                 </div>
@@ -107,9 +107,9 @@
 <t t-name="reconciliation.manual.line" t-extend="reconciliation.line">
     <t t-jquery=".o_buttons" t-operation="replace">
         <div class="pull-right o_buttons">
-            <button t-attf-class="o_validate btn btn-default #{!state.balance.type ? '' : 'd-none'}">Reconcile</button>
+            <button t-attf-class="o_validate btn btn-secondary #{!state.balance.type ? '' : 'd-none'}">Reconcile</button>
             <button t-attf-class="o_reconcile btn btn-primary #{state.balance.type &gt; 0 ? '' : 'd-none'}">Reconcile</button>
-            <button t-attf-class="o_no_valid btn btn-default #{state.balance.type &lt; 0 ? '' : 'd-none'}">Skip</button>
+            <button t-attf-class="o_no_valid btn btn-secondary #{state.balance.type &lt; 0 ? '' : 'd-none'}">Skip</button>
         </div>
     </t>
     <t t-jquery=".accounting_view tbody" t-operation="append">
diff --git a/addons/account/static/tests/reconciliation_tests.js b/addons/account/static/tests/reconciliation_tests.js
index 206c00ea7d4..e217d381642 100644
--- a/addons/account/static/tests/reconciliation_tests.js
+++ b/addons/account/static/tests/reconciliation_tests.js
@@ -661,7 +661,7 @@ QUnit.module('account', {
             " 101200 2017-02-28 Camptocamp: INV/2017/0001 $ 4,610.00 111100 2017-02-28 Camptocamp: BILL/2017/0001 $ 10,000.00 111100 2017-02-28 ASUSTeK: BILL/2017/0002 $ 5,749.99 ",
             "should display the next 5 account move lines");
 
-        assert.ok(clientAction.widgets[0].$('caption button.btn-default:visible').length, "should display the 'validate' button");
+        assert.ok(clientAction.widgets[0].$('caption button.btn-secondary:visible').length, "should display the 'validate' button");
         assert.ok(clientAction.widgets[1].$('caption .text-danger:visible').length, "should display the 'Select a partner or choose a counterpart' message");
         assert.ok(clientAction.widgets[2].$('caption button.btn-primary:visible').length, "should display the 'Reconcile' button");
 
@@ -1029,7 +1029,7 @@ QUnit.module('account', {
         assert.strictEqual(widget.$('.accounting_view tbody tr').length, 1, "should have ever only the created reconcile line");
         assert.strictEqual(widget.$('.accounting_view tbody tr').text().replace(/[\n\r\s$,]+/g, ' '), " 101200 SAJ/2014/002 and SAJ/2014/003 1100.00 ",
             "the new line should be update the amout");
-        assert.ok(widget.$('caption button.btn-default:visible').length, "should display the 'validate' button");
+        assert.ok(widget.$('caption button.btn-secondary:visible').length, "should display the 'validate' button");
 
         widget.$('.create .add_line').trigger('click').trigger('click');
         widget.$('.create .create_amount input').val('-100').trigger('input');
diff --git a/addons/account/views/account_payment_view.xml b/addons/account/views/account_payment_view.xml
index 09e3de5942f..91bde7b508c 100644
--- a/addons/account/views/account_payment_view.xml
+++ b/addons/account/views/account_payment_view.xml
@@ -287,7 +287,7 @@
                     </sheet>
                     <footer>
                         <button string='Validate' name="action_validate_invoice_payment" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
@@ -355,7 +355,7 @@
                     </group>
                     <footer>
                         <button string='Validate' name="create_payments" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                </form>
             </field>
diff --git a/addons/account/views/account_portal_templates.xml b/addons/account/views/account_portal_templates.xml
index 1d6640c7dba..0a1cd2ac10a 100644
--- a/addons/account/views/account_portal_templates.xml
+++ b/addons/account/views/account_portal_templates.xml
@@ -85,8 +85,8 @@
                         </div>
                         <div class="o_payment_button">
                             <div class="text-center mb8 ml16 mr16 o_download_pdf">
-                                <a class="btn btn-default btn-block o_download_btn" t-att-href="'/my/invoices/pdf/%s?%s' % (invoice.id, keep_query())" title="Download"><i class="fa fa-download"/> Download</a>
-                                <a class="btn btn-default btn-block d-none d-lg-inline-block o_print_btn o_portal_invoice_print" t-att-href="'/my/invoices/pdf/%s?%s&amp;print=true' % (invoice.id, keep_query())" id="print_invoice_report" title="Print"><i class="fa fa-print"/> Print</a>
+                                <a class="btn btn-secondary btn-block o_download_btn" t-att-href="'/my/invoices/pdf/%s?%s' % (invoice.id, keep_query())" title="Download"><i class="fa fa-download"/> Download</a>
+                                <a class="btn btn-secondary btn-block d-none d-lg-inline-block o_print_btn o_portal_invoice_print" t-att-href="'/my/invoices/pdf/%s?%s&amp;print=true' % (invoice.id, keep_query())" id="print_invoice_report" title="Print"><i class="fa fa-print"/> Print</a>
                             </div>
                         </div>
                         <hr t-if="invoice.user_id" class="mt0 mb0"/>
diff --git a/addons/account/views/account_view.xml b/addons/account/views/account_view.xml
index 96a4a3b3d44..2fad4d5c6b0 100644
--- a/addons/account/views/account_view.xml
+++ b/addons/account/views/account_view.xml
@@ -531,7 +531,7 @@
                     </group>
                     <footer>
                         <button string="Confirm" name="validate" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
@@ -556,7 +556,7 @@
                     <p>Confirming this will create automatically a journal entry with the difference in the profit/loss account set on the cash journal.</p>
                     <footer>
                         <button string="Confirm" name="validate" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </div>
                 </form>
diff --git a/addons/account/wizard/account_invoice_refund_view.xml b/addons/account/wizard/account_invoice_refund_view.xml
index 1bfcc5e2552..d1c856020ea 100644
--- a/addons/account/wizard/account_invoice_refund_view.xml
+++ b/addons/account/wizard/account_invoice_refund_view.xml
@@ -41,7 +41,7 @@
                     </group>
                     <footer>
                         <button string='Add Credit Note' name="invoice_refund" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                </form>
             </field>
diff --git a/addons/account/wizard/account_invoice_state_view.xml b/addons/account/wizard/account_invoice_state_view.xml
index 068f2ac6557..db2ad3ad6bb 100644
--- a/addons/account/wizard/account_invoice_state_view.xml
+++ b/addons/account/wizard/account_invoice_state_view.xml
@@ -14,7 +14,7 @@
                     </p>
                     <footer>
                         <button string="Confirm Invoices" name="invoice_confirm" type="object" default_focus="1" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/account/wizard/account_move_reversal_view.xml b/addons/account/wizard/account_move_reversal_view.xml
index dbe59d4ae3a..a3c0161c7b6 100644
--- a/addons/account/wizard/account_move_reversal_view.xml
+++ b/addons/account/wizard/account_move_reversal_view.xml
@@ -13,7 +13,7 @@
                     </group>
                     <footer>
                         <button string="Reverse Moves" name="reverse_moves" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                </form>
             </field>
diff --git a/addons/account/wizard/account_reconcile_view.xml b/addons/account/wizard/account_reconcile_view.xml
index 47fd1c9026e..1837655073b 100644
--- a/addons/account/wizard/account_reconcile_view.xml
+++ b/addons/account/wizard/account_reconcile_view.xml
@@ -20,7 +20,7 @@
                         <button string="Reconcile" name="trans_rec_reconcile_full" type="object" default_focus="1" attrs="{'invisible':[('writeoff','!=',0)]}" class="btn-primary"/>
                         <button string="Reconcile With Write-Off" name="trans_rec_addendum_writeoff" type="object" attrs="{'invisible':[('writeoff','=',0)]}" class="btn-primary"/>
                         <button string="Partial Reconcile" name="trans_rec_reconcile_partial_reconcile" type="object" attrs="{'invisible':['|',('writeoff','=',0),('trans_nbr','&lt;',2)]}" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                </form>
             </field>
@@ -47,7 +47,7 @@
                     </group>
                     <footer>
                         <button string="Reconcile" name="trans_rec_reconcile" type="object" default_focus="1" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                </form>
             </field>
diff --git a/addons/account/wizard/account_report_aged_partner_balance_view.xml b/addons/account/wizard/account_report_aged_partner_balance_view.xml
index fc0fab2f3ea..c801bfebcd1 100644
--- a/addons/account/wizard/account_report_aged_partner_balance_view.xml
+++ b/addons/account/wizard/account_report_aged_partner_balance_view.xml
@@ -19,7 +19,7 @@
                 <field name="journal_ids" required="0" invisible="1"/>
                 <footer>
                     <button name="check_report" string="Print" type="object" default_focus="1" class="oe_highlight"/>
-                    <button string="Cancel" class="btn btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn btn-secondary" special="cancel"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/account/wizard/account_report_common_view.xml b/addons/account/wizard/account_report_common_view.xml
index be111dba194..d7339fa91a5 100644
--- a/addons/account/wizard/account_report_common_view.xml
+++ b/addons/account/wizard/account_report_common_view.xml
@@ -17,7 +17,7 @@
             </group>
             <footer>
                 <button name="check_report" string="Print" type="object" default_focus="1" class="oe_highlight"/>
-                <button string="Cancel" class="btn btn-default" special="cancel" />
+                <button string="Cancel" class="btn btn-secondary" special="cancel" />
             </footer>
         </form>
         </field>
diff --git a/addons/account/wizard/account_unreconcile_view.xml b/addons/account/wizard/account_unreconcile_view.xml
index 374a7f85f33..27604a931b3 100644
--- a/addons/account/wizard/account_unreconcile_view.xml
+++ b/addons/account/wizard/account_unreconcile_view.xml
@@ -11,7 +11,7 @@
                 <form class="o_form_label">If you unreconcile transactions, you must also verify all the actions that are linked to those transactions because they will not be disabled</form>
                 <footer>
                     <button string="Unreconcile" name="trans_unrec" type="object" default_focus="1" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
             </field>
diff --git a/addons/account/wizard/account_validate_move_view.xml b/addons/account/wizard/account_validate_move_view.xml
index 7ffe823afc9..0dcf74e41dd 100644
--- a/addons/account/wizard/account_validate_move_view.xml
+++ b/addons/account/wizard/account_validate_move_view.xml
@@ -11,7 +11,7 @@
                     <span class="o_form_label">All selected journal entries will be validated and posted. You won't be able to modify them afterwards.</span>
                     <footer>
                         <button string="Post Journal Entries" name="validate_move" type="object" default_focus="1" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/account/wizard/multi_compose_message_views.xml b/addons/account/wizard/multi_compose_message_views.xml
index 7a294573863..699256f9200 100644
--- a/addons/account/wizard/multi_compose_message_views.xml
+++ b/addons/account/wizard/multi_compose_message_views.xml
@@ -52,10 +52,10 @@
                             attrs="{'invisible': ['|', '|', '|', ('is_log', '=', True), ('printed', '=', True), ('is_print', '=', False), ('is_email', '=', True)]}"
                             name="print_action" type="object" class="btn-primary o_mail_send"/>
                         <button string="Done" attrs="{'invisible': [('printed', '=', False)]}" special="cancel" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                         <button icon="fa-lg fa-save" type="object" name="save_as_template" string="Save as new template"
                             attrs="{'invisible': ['|', '|', '|', ('is_log', '=', True), ('printed', '=', True), ('is_email', '=', False)]}"
-                            class="pull-right btn-default" help="Save as a new template" />
+                            class="pull-right btn-secondary" help="Save as a new template" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/account/wizard/pos_box.xml b/addons/account/wizard/pos_box.xml
index f325c39a33c..67be6485cac 100644
--- a/addons/account/wizard/pos_box.xml
+++ b/addons/account/wizard/pos_box.xml
@@ -13,7 +13,7 @@
                     </group>
                     <footer>
                         <button name="run" string="Put Money In" type="object" class="btn-primary"/>
-                        <button special="cancel" string="Cancel" class="btn-default"/>
+                        <button special="cancel" string="Cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
@@ -41,7 +41,7 @@
 
                     <footer>
                         <button name="run" string="Take Money Out" type="object" class="btn-primary"/>
-                        <button class="btn-default" special="cancel" string="Cancel" />
+                        <button class="btn-secondary" special="cancel" string="Cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/account/wizard/wizard_tax_adjustments_view.xml b/addons/account/wizard/wizard_tax_adjustments_view.xml
index dba164388b9..20ef298914d 100644
--- a/addons/account/wizard/wizard_tax_adjustments_view.xml
+++ b/addons/account/wizard/wizard_tax_adjustments_view.xml
@@ -29,11 +29,11 @@
             <footer>
               <div attrs="{'invisible': [('adjustment_type', '=', 'credit')]}">
                 <button name="create_move_debit" string="Create and post move" type="object" default_focus="1" class="oe_highlight"/>
-                <button string="Cancel" class="btn btn-default" special="cancel" />
+                <button string="Cancel" class="btn btn-secondary" special="cancel" />
               </div>
               <div attrs="{'invisible': [('adjustment_type', '!=', 'credit')]}">
                 <button name="create_move_credit" string="Create and post move" type="object" default_focus="1" class="oe_highlight"/>
-                <button string="Cancel" class="btn btn-default" special="cancel" />
+                <button string="Cancel" class="btn btn-secondary" special="cancel" />
               </div>
             </footer>
         </form>
diff --git a/addons/account_asset/wizard/asset_depreciation_confirmation_wizard_views.xml b/addons/account_asset/wizard/asset_depreciation_confirmation_wizard_views.xml
index ee12b167246..6eafdd5ee2b 100644
--- a/addons/account_asset/wizard/asset_depreciation_confirmation_wizard_views.xml
+++ b/addons/account_asset/wizard/asset_depreciation_confirmation_wizard_views.xml
@@ -16,7 +16,7 @@
                 </group>
                 <footer>
                     <button string="Generate Entries" name="asset_compute" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
          </field>
diff --git a/addons/account_asset/wizard/asset_modify_views.xml b/addons/account_asset/wizard/asset_modify_views.xml
index 6e0335376e0..4388deda14e 100644
--- a/addons/account_asset/wizard/asset_modify_views.xml
+++ b/addons/account_asset/wizard/asset_modify_views.xml
@@ -22,7 +22,7 @@
                 </group>
                 <footer>
                     <button name="modify" string="Modify" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/account_bank_statement_import/account_bank_statement_import_view.xml b/addons/account_bank_statement_import/account_bank_statement_import_view.xml
index 3c55bf51ce0..bcfee4573d1 100644
--- a/addons/account_bank_statement_import/account_bank_statement_import_view.xml
+++ b/addons/account_bank_statement_import/account_bank_statement_import_view.xml
@@ -17,7 +17,7 @@
                     <field name="filename" invisible="1"/>
                     <footer>
                         <button name="import_file" string="_Import" type="object" class="btn-primary" />
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/account_bank_statement_import/wizard/journal_creation.xml b/addons/account_bank_statement_import/wizard/journal_creation.xml
index 666c70d9f6e..5c34e869155 100644
--- a/addons/account_bank_statement_import/wizard/journal_creation.xml
+++ b/addons/account_bank_statement_import/wizard/journal_creation.xml
@@ -22,7 +22,7 @@
                     </group>
                     <footer>
                         <button name="create_journal" string="OK" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/account_check_printing/wizard/print_prenumbered_checks_views.xml b/addons/account_check_printing/wizard/print_prenumbered_checks_views.xml
index 428ff9c2de3..b593440c5aa 100644
--- a/addons/account_check_printing/wizard/print_prenumbered_checks_views.xml
+++ b/addons/account_check_printing/wizard/print_prenumbered_checks_views.xml
@@ -13,7 +13,7 @@
                     </group>
                     <footer>
                         <button name="print_checks" string="Print" type="object" class="oe_highlight"/>
-                        <button string="Cancel" class="btn btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/base_gengo/wizard/base_gengo_translations_view.xml b/addons/base_gengo/wizard/base_gengo_translations_view.xml
index 1d5ef223f1d..224e4c47d44 100644
--- a/addons/base_gengo/wizard/base_gengo_translations_view.xml
+++ b/addons/base_gengo/wizard/base_gengo_translations_view.xml
@@ -23,7 +23,7 @@
                     </group>
                     <footer>
                         <button name="act_update" string="Send" type="object" class="btn-primary"/>
-                        <button name="act_cancel" special="cancel" string="Cancel" type="object" class="btn-default"/>
+                        <button name="act_cancel" special="cancel" string="Cancel" type="object" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/base_import/static/src/js/import_action.js b/addons/base_import/static/src/js/import_action.js
index 44db3151e32..7d91f2f1207 100644
--- a/addons/base_import/static/src/js/import_action.js
+++ b/addons/base_import/static/src/js/import_action.js
@@ -298,7 +298,7 @@ var DataImport = AbstractAction.extend(ControlPanelMixin, {
         var self = this;
         this.$buttons.filter('.oe_import_file')
             .text(_t('Load New File'))
-            .removeClass('btn-primary').addClass('btn-default')
+            .removeClass('btn-primary').addClass('btn-secondary')
             .blur();
         this.$buttons.filter('.o_import_import, .o_import_validate, .o_import_file_reload').removeClass('d-none');
         this.$el.find('.oe_import_box, .oe_import_with_file').removeClass('d-none');
diff --git a/addons/base_import/static/src/xml/base_import.xml b/addons/base_import/static/src/xml/base_import.xml
index d84800eca01..da83361db0f 100644
--- a/addons/base_import/static/src/xml/base_import.xml
+++ b/addons/base_import/static/src/xml/base_import.xml
@@ -94,10 +94,10 @@
 
     <t t-name="ImportView.buttons">
         <button type="button" class="btn btn-primary o_import_import d-none">Import</button>
-        <button type="button" class="btn btn-default o_import_validate d-none">Test Import</button>
+        <button type="button" class="btn btn-secondary o_import_validate d-none">Test Import</button>
         <button type="button" class="btn btn-primary oe_import_file">Load File</button>
-        <button type="button" class="btn btn-default o_import_file_reload d-none">Reload File</button>
-        <button type="button" class="btn btn-default o_import_cancel">Cancel</button>
+        <button type="button" class="btn btn-secondary o_import_file_reload d-none">Reload File</button>
+        <button type="button" class="btn btn-secondary o_import_cancel">Cancel</button>
     </t>
 
     <t t-name="ImportView.preview">
@@ -155,7 +155,7 @@
         <t t-if="error.moreinfo" t-raw="info(error.moreinfo)"/>
     </t>
     <t t-name="ImportView.import_button">
-        <button t-if='widget and widget.importEnabled' type="button" class="btn btn-default o_button_import">
+        <button t-if='widget and widget.importEnabled' type="button" class="btn btn-secondary o_button_import">
             Import
         </button>
     </t>
diff --git a/addons/base_import_module/views/base_import_module_view.xml b/addons/base_import_module/views/base_import_module_view.xml
index 7c46391f116..fb18fdfbf49 100644
--- a/addons/base_import_module/views/base_import_module_view.xml
+++ b/addons/base_import_module/views/base_import_module_view.xml
@@ -20,11 +20,11 @@
                     <footer>
                         <div states="init">
                             <button name="import_module" string="Import App" type="object" class="btn-primary"/>
-                            <button special="cancel" string="Cancel" class="btn-default"/>
+                            <button special="cancel" string="Cancel" class="btn-secondary"/>
                         </div>
                         <div states="done">
                             <button name="action_module_open" string="Open Modules" type="object" class="btn-primary"/>
-                            <button special="cancel" string="Close" class="btn-default"/>
+                            <button special="cancel" string="Close" class="btn-secondary"/>
                         </div>
                     </footer>
                 </form>
diff --git a/addons/crm/views/crm_lead_views.xml b/addons/crm/views/crm_lead_views.xml
index 88c171ba8e7..dbf50c5d896 100644
--- a/addons/crm/views/crm_lead_views.xml
+++ b/addons/crm/views/crm_lead_views.xml
@@ -248,7 +248,7 @@
                         <footer>
                             <button string="Create" name="close_dialog" type="object" class="btn-primary"/>
                             <button string="Create &amp; Edit" name="edit_dialog" type="object" class="btn-primary"/>
-                            <button string="Discard" class="btn-default" special="cancel"/>
+                            <button string="Discard" class="btn-secondary" special="cancel"/>
                         </footer>
                         <field name="partner_name" invisible="1"/>
                         <field name="contact_name" invisible="1"/>
diff --git a/addons/crm/wizard/crm_lead_lost_views.xml b/addons/crm/wizard/crm_lead_lost_views.xml
index 9886c030829..2e0ed225c37 100644
--- a/addons/crm/wizard/crm_lead_lost_views.xml
+++ b/addons/crm/wizard/crm_lead_lost_views.xml
@@ -10,7 +10,7 @@
                     </group>
                     <footer>
                         <button name="action_lost_reason_apply" string="Submit" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/crm/wizard/crm_lead_to_opportunity_views.xml b/addons/crm/wizard/crm_lead_to_opportunity_views.xml
index 5b29d25b934..c12587a5fb0 100644
--- a/addons/crm/wizard/crm_lead_to_opportunity_views.xml
+++ b/addons/crm/wizard/crm_lead_to_opportunity_views.xml
@@ -37,7 +37,7 @@
                     </group>
                     <footer>
                         <button name="action_apply" string="Create Opportunity" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
@@ -85,7 +85,7 @@
                     </group>
                     <footer>
                         <button name="mass_convert" string="Convert to Opportunities" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/crm/wizard/crm_merge_opportunities_views.xml b/addons/crm/wizard/crm_merge_opportunities_views.xml
index 0637b4b5571..3841ffaa159 100644
--- a/addons/crm/wizard/crm_merge_opportunities_views.xml
+++ b/addons/crm/wizard/crm_merge_opportunities_views.xml
@@ -27,7 +27,7 @@
                     </group>
                     <footer>
                         <button name="action_merge" type="object" string="Merge" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/crm_project/wizard/crm_lead_convert2task_views.xml b/addons/crm_project/wizard/crm_lead_convert2task_views.xml
index 1984f8d4d79..41921863be2 100644
--- a/addons/crm_project/wizard/crm_lead_convert2task_views.xml
+++ b/addons/crm_project/wizard/crm_lead_convert2task_views.xml
@@ -12,7 +12,7 @@
                 </group>
                 <footer>
                     <button type="object" name="action_lead_to_project_task" string="Create Task" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/delivery/wizard/choose_delivery_package_views.xml b/addons/delivery/wizard/choose_delivery_package_views.xml
index e7c2c975ad1..c37231ed38d 100644
--- a/addons/delivery/wizard/choose_delivery_package_views.xml
+++ b/addons/delivery/wizard/choose_delivery_package_views.xml
@@ -16,7 +16,7 @@
                 </group>
                 <footer>
                     <button name="put_in_pack" type="object" string="Save" class="btn-primary"/>
-                    <button string="Discard" special="cancel" class="btn-default"/>
+                    <button string="Discard" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/event/wizard/event_confirm_view.xml b/addons/event/wizard/event_confirm_view.xml
index 1cd67ac8da8..32ccde4980a 100644
--- a/addons/event/wizard/event_confirm_view.xml
+++ b/addons/event/wizard/event_confirm_view.xml
@@ -10,7 +10,7 @@
                   <span class="o_form_label">Warning: This Event has not reached its Minimum Registration Limit. Are you sure you want to confirm it?</span>
                   <footer>
                       <button name="confirm" string="Confirm Anyway" type="object" class="btn-primary"/>
-                      <button string="Cancel" class="btn-default" special="cancel" />
+                      <button string="Cancel" class="btn-secondary" special="cancel" />
                   </footer>
             </form>
             </field>
diff --git a/addons/event_sale/wizard/event_edit_registration.xml b/addons/event_sale/wizard/event_edit_registration.xml
index 5adc5d50bae..92a69107ba7 100644
--- a/addons/event_sale/wizard/event_edit_registration.xml
+++ b/addons/event_sale/wizard/event_edit_registration.xml
@@ -20,7 +20,7 @@
                     </field>
                     <footer>
                         <button string="Apply" name="action_make_registration" type="object" class="btn-primary"/>
-                        <button string="Skip" class="btn-default" special="cancel"/>
+                        <button string="Skip" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/gamification/wizard/grant_badge.xml b/addons/gamification/wizard/grant_badge.xml
index 06b8ff122ce..dde5b011b1a 100644
--- a/addons/gamification/wizard/grant_badge.xml
+++ b/addons/gamification/wizard/grant_badge.xml
@@ -12,7 +12,7 @@
                 </group>
                 <footer>
                     <button string="Grant Badge" type="object" name="action_grant_badge" class="btn-primary" />
-                    <button string="Cancel" special="cancel" class="btn-default"/>
+                    <button string="Cancel" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/gamification/wizard/update_goal.xml b/addons/gamification/wizard/update_goal.xml
index a3d03d9a861..532750778d6 100644
--- a/addons/gamification/wizard/update_goal.xml
+++ b/addons/gamification/wizard/update_goal.xml
@@ -11,7 +11,7 @@
                 </group>
                 <footer>
                     <button string="Update" type="object" name="action_update_current" class="btn-primary" />
-                    <button string="Cancel" special="cancel" class="btn-default"/>
+                    <button string="Cancel" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/google_calendar/static/src/js/google_calendar.js b/addons/google_calendar/static/src/js/google_calendar.js
index 91d3c6709b0..2759d44f985 100644
--- a/addons/google_calendar/static/src/js/google_calendar.js
+++ b/addons/google_calendar/static/src/js/google_calendar.js
@@ -115,7 +115,7 @@ CalendarRenderer.include({
         this.$googleButton = $();
         if (this.model === "calendar.event") {
             this.$googleButton = $('<button/>', {type: 'button', html: _t("Sync with <b>Google</b>")})
-                                .addClass('o_google_sync_button oe_button btn btn-default')
+                                .addClass('o_google_sync_button oe_button btn btn-secondary')
                                 .prepend($('<img/>', {
                                     src: "/google_calendar/static/src/img/calendar_32.png",
                                 }))
diff --git a/addons/hr_attendance/static/src/scss/hr_attendance.scss b/addons/hr_attendance/static/src/scss/hr_attendance.scss
index a129850cc8c..308829b152f 100644
--- a/addons/hr_attendance/static/src/scss/hr_attendance.scss
+++ b/addons/hr_attendance/static/src/scss/hr_attendance.scss
@@ -94,7 +94,7 @@
         border-radius: .1em;
         box-shadow: inset 0 -3px 0 fade-out(black, 0.7);
 
-        &.btn-default:hover {
+        &.btn-secondary:hover {
             color: $o-brand-optional;
         }
     }
@@ -109,7 +109,7 @@
             }
         }
 
-        .d-none.d-md-inline-block.btn-default {
+        .d-none.d-md-inline-block.btn-secondary {
             transform: translate(-50%, -50%);
             @include o-position-absolute(0, $left:0);
             width: 2em;
@@ -125,7 +125,7 @@
         }
     }
 
-    .btn-default{
+    .btn-secondary{
         box-shadow: inset 0 0 0 1px fade-out(black, 0.9);
         color: $headings-color;
     }
diff --git a/addons/hr_attendance/static/src/xml/attendance.xml b/addons/hr_attendance/static/src/xml/attendance.xml
index 87916d62795..7da29413eeb 100644
--- a/addons/hr_attendance/static/src/xml/attendance.xml
+++ b/addons/hr_attendance/static/src/xml/attendance.xml
@@ -43,7 +43,7 @@
                     <h1 class="mb8"><t t-esc="widget.employee.name"/></h1>
                     <h3 class="mt8 mb24"><t t-if="!checked_in">Welcome!</t><t t-else="">Want to check out?</t></h3>
                     <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-out btn-warning" t-if="checked_in" aria-label="Sign out" title="Sign out"/>
-                    <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-in btn-default" t-if="!checked_in" aria-label="Sign in" title="Sign in"/>
+                    <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-in btn-secondary" t-if="!checked_in" aria-label="Sign in" title="Sign in"/>
                     <h3 class="mt0 mb0 text-muted">Click to <b t-if="checked_in">check out</b><b t-if="!checked_in">check in</b></h3>
                 </t>
                 <t t-else="">
@@ -60,8 +60,8 @@
             <div class="o_hr_attendance_kiosk_mode">
                 <t t-set="checked_in" t-value="widget.employee_state=='checked_in'"/>
                 <div class="o_hr_attendance_back_button">
-                    <span class="btn btn-default btn-lg d-block d-md-none"><i class="fa fa-chevron-left mr8"/> Go back</span>
-                    <span class="btn btn-default d-none d-md-inline-block"><i class="fa fa-chevron-left" role="img" aria-label="Go back" title="Go back"/></span>
+                    <span class="btn btn-secondary btn-lg d-block d-md-none"><i class="fa fa-chevron-left mr8"/> Go back</span>
+                    <span class="btn btn-secondary d-none d-md-inline-block"><i class="fa fa-chevron-left" role="img" aria-label="Go back" title="Go back"/></span>
                 </div>
                 <t t-if="widget.employee_id">
                     <div class="o_hr_attendance_user_badge o_home_menu_background">
@@ -71,7 +71,7 @@
                     <h3 class="mt8 mb24"><t t-if="!checked_in">Welcome!</t><t t-else="">Want to check out?</t></h3>
                     <t t-if="!widget.use_pin">
                         <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-out btn-warning" t-if="checked_in" aria-label="Sign out" title="Sign out"/>
-                        <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-in btn-default" t-if="!checked_in" aria-label="Sign in" title="Sign in"/>
+                        <a class="fa fa-7x o_hr_attendance_sign_in_out_icon fa-sign-in btn-secondary" t-if="!checked_in" aria-label="Sign in" title="Sign in"/>
                         <h3 class="mt0 mb0 text-muted">Click to <b t-if="checked_in">check out</b><b t-else="">check in</b></h3>
                     </t>
                     <t t-else="">
@@ -84,7 +84,7 @@
                                 <div class="row">
                                     <t t-foreach="['1', '2', '3', '4', '5', '6', '7', '8', '9', ['C', 'btn-warning'], '0', ['ok', 'btn-primary']]" t-as="btn_name">
                                         <div class="col-xs-4 mb4">
-                                            <a t-attf-class="btn {{btn_name[1]? btn_name[1] : 'btn-default'}} btn-block btn-lg {{ 'o_hr_attendance_pin_pad_button_' + btn_name[0] }}"><t t-esc="btn_name[0]"/></a>
+                                            <a t-attf-class="btn {{btn_name[1]? btn_name[1] : 'btn-secondary'}} btn-block btn-lg {{ 'o_hr_attendance_pin_pad_button_' + btn_name[0] }}"><t t-esc="btn_name[0]"/></a>
                                         </div>
                                     </t>
                                 </div>
@@ -134,7 +134,7 @@
                 </t>
                 <t t-else="">
                     <div class="alert alert-warning" role="alert">Invalid request, please return to the main menu.</div>
-                    <button class="o_hr_attendance_button_dismiss btn btn-default btn-lg">Go back</button>
+                    <button class="o_hr_attendance_button_dismiss btn btn-secondary btn-lg">Go back</button>
                 </t>
             </div>
         </div>
diff --git a/addons/hr_expense/wizard/hr_expense_sheet_register_payment.xml b/addons/hr_expense/wizard/hr_expense_sheet_register_payment.xml
index 77f1d1e3eeb..2f0c668767a 100644
--- a/addons/hr_expense/wizard/hr_expense_sheet_register_payment.xml
+++ b/addons/hr_expense/wizard/hr_expense_sheet_register_payment.xml
@@ -32,7 +32,7 @@
                     </sheet>
                     <footer>
                         <button string='Validate' name="expense_post_payment" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/hr_gamification/wizard/gamification_badge_user_wizard_views.xml b/addons/hr_gamification/wizard/gamification_badge_user_wizard_views.xml
index b2d20bd219e..198cfeb2d20 100644
--- a/addons/hr_gamification/wizard/gamification_badge_user_wizard_views.xml
+++ b/addons/hr_gamification/wizard/gamification_badge_user_wizard_views.xml
@@ -31,7 +31,7 @@
                     </group>
                     <footer>
                         <button string="Reward Employee" type="object" name="action_grant_badge" class="btn-primary" />
-                        <button string="Cancel" special="cancel" class="btn-default"/>
+                        <button string="Cancel" special="cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/hr_holidays/wizard/hr_holidays_summary_department_views.xml b/addons/hr_holidays/wizard/hr_holidays_summary_department_views.xml
index 9643b3f2103..9e22163fbf6 100644
--- a/addons/hr_holidays/wizard/hr_holidays_summary_department_views.xml
+++ b/addons/hr_holidays/wizard/hr_holidays_summary_department_views.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="print_report" string="Print" type="object" class="btn-primary"/>
-                    <button string="Cancel" special="cancel" class="btn-default"/>
+                    <button string="Cancel" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
             </field>
diff --git a/addons/hr_holidays/wizard/hr_holidays_summary_employees_views.xml b/addons/hr_holidays/wizard/hr_holidays_summary_employees_views.xml
index 7ea33bf3e01..c1e9b32a0d4 100644
--- a/addons/hr_holidays/wizard/hr_holidays_summary_employees_views.xml
+++ b/addons/hr_holidays/wizard/hr_holidays_summary_employees_views.xml
@@ -15,7 +15,7 @@
                     </group>
                     <footer>
                         <button name="print_report" string="Print" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/hr_payroll/wizard/hr_payroll_contribution_register_report_views.xml b/addons/hr_payroll/wizard/hr_payroll_contribution_register_report_views.xml
index e1f7db1735f..fd67a95ebac 100644
--- a/addons/hr_payroll/wizard/hr_payroll_contribution_register_report_views.xml
+++ b/addons/hr_payroll/wizard/hr_payroll_contribution_register_report_views.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="print_report" string="Print" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
             </field>
diff --git a/addons/hr_recruitment/views/hr_recruitment_views.xml b/addons/hr_recruitment/views/hr_recruitment_views.xml
index 388120b0b6d..2569e5a59a4 100644
--- a/addons/hr_recruitment/views/hr_recruitment_views.xml
+++ b/addons/hr_recruitment/views/hr_recruitment_views.xml
@@ -451,7 +451,7 @@
                     </group>
                     <footer>
                         <button string="Create" name="close_dialog" type="object" class="btn-primary"/>
-                        <button string="Discard" class="btn-default" special="cancel"/>
+                        <button string="Discard" class="btn-secondary" special="cancel"/>
                     </footer>
                 </sheet>
             </form>
diff --git a/addons/l10n_eu_service/wizard/wizard.xml b/addons/l10n_eu_service/wizard/wizard.xml
index 917ad1df67a..f37da524bbc 100644
--- a/addons/l10n_eu_service/wizard/wizard.xml
+++ b/addons/l10n_eu_service/wizard/wizard.xml
@@ -36,7 +36,7 @@
                     <footer>
                         <button string="Create Fiscal Positions and Taxes"
                                 name="generate_eu_service" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                  </form>
             </field>
diff --git a/addons/l10n_fr_fec/wizard/account_fr_fec_view.xml b/addons/l10n_fr_fec/wizard/account_fr_fec_view.xml
index f32db2a96b8..e4a5cd75b83 100644
--- a/addons/l10n_fr_fec/wizard/account_fr_fec_view.xml
+++ b/addons/l10n_fr_fec/wizard/account_fr_fec_view.xml
@@ -108,7 +108,7 @@
             <footer>
                 <button string="Generate" name="generate_fec" type="object"
                     class="oe_highlight"/>
-                <button string="Cancel" class="btn btn-default" special="cancel"/>
+                <button string="Cancel" class="btn btn-secondary" special="cancel"/>
             </footer>
         </form>
     </field>
diff --git a/addons/l10n_in_hr_payroll/wizard/hr_salary_employee_bymonth_view.xml b/addons/l10n_in_hr_payroll/wizard/hr_salary_employee_bymonth_view.xml
index 1533a5c6e98..cb05f282174 100644
--- a/addons/l10n_in_hr_payroll/wizard/hr_salary_employee_bymonth_view.xml
+++ b/addons/l10n_in_hr_payroll/wizard/hr_salary_employee_bymonth_view.xml
@@ -8,7 +8,7 @@
                 <span class="o_form_label">This wizard will print report which displays employees break-up of Net Head for a specified dates.</span>
                 <footer>
                     <button name="print_report" string="Print" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
                 <group>
                     <field name="start_date"/>
diff --git a/addons/l10n_in_hr_payroll/wizard/hr_yearly_salary_detail_view.xml b/addons/l10n_in_hr_payroll/wizard/hr_yearly_salary_detail_view.xml
index fab60113887..0de770b2229 100644
--- a/addons/l10n_in_hr_payroll/wizard/hr_yearly_salary_detail_view.xml
+++ b/addons/l10n_in_hr_payroll/wizard/hr_yearly_salary_detail_view.xml
@@ -8,7 +8,7 @@
                 <span class="o_form_label">This wizard will print report which display a pay head employee breakup for a specified dates.</span>
                 <footer>
                     <button name="print_report" string="Print" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
                 <group>
                     <field name="date_from"/>
diff --git a/addons/lunch/wizard/lucky_order_view.xml b/addons/lunch/wizard/lucky_order_view.xml
index f6ae254f8c6..2aafbb762b9 100644
--- a/addons/lunch/wizard/lucky_order_view.xml
+++ b/addons/lunch/wizard/lucky_order_view.xml
@@ -14,7 +14,7 @@
                     </group>
                     <footer>
                         <button name="random_pick" string="I'm feeling lucky"  type="object" class="oe_highlight"/>
-                        <button string="Cancel" class="btn btn-default" special="cancel" />
+                        <button string="Cancel" class="btn btn-secondary" special="cancel" />
                     </footer>
                 </form>
               </field>
diff --git a/addons/mail/static/src/js/discuss_mobile.js b/addons/mail/static/src/js/discuss_mobile.js
index 867af05152c..8e3f0f86c22 100644
--- a/addons/mail/static/src/js/discuss_mobile.js
+++ b/addons/mail/static/src/js/discuss_mobile.js
@@ -207,9 +207,9 @@ Discuss.include({
                     .removeClass('o_hidden');
                 self.$('.o_mailbox_inbox_item')
                     .removeClass('btn-primary')
-                    .addClass('btn-default');
+                    .addClass('btn-secondary');
                 self.$('.o_mailbox_inbox_item[data-type=' + type + ']')
-                    .removeClass('btn-default')
+                    .removeClass('btn-secondary')
                     .addClass('btn-primary');
             } else {
                 self.$('.o_mail_discuss_mobile_mailboxes_buttons')
diff --git a/addons/mail/static/src/scss/discuss.scss b/addons/mail/static/src/scss/discuss.scss
index e2d5d8eb2f9..5995cab52e2 100644
--- a/addons/mail/static/src/scss/discuss.scss
+++ b/addons/mail/static/src/scss/discuss.scss
@@ -277,7 +277,7 @@
                 width: 50%;
                 padding: 2%;
 
-                &.btn-default {
+                &.btn-secondary {
                     border-bottom: 1px solid $gray-lighter-darker
                 }
             }
diff --git a/addons/mail/static/src/xml/activity.xml b/addons/mail/static/src/xml/activity.xml
index 1ca80f46fcd..abad7e51a4f 100644
--- a/addons/mail/static/src/xml/activity.xml
+++ b/addons/mail/static/src/xml/activity.xml
@@ -65,7 +65,7 @@
                             <a role="button" href="#" class="btn btn-link btn-success text-muted o_activity_done o_activity_link mr8" t-att-data-activity-id="activity.id" t-att-data-previous-activity-type-id="activity.activity_type_id[0]" data-toggle="popover">
                                 <i class="fa fa-check"/> Mark Done
                             </a>
-                            <a role="button" href="#" class="btn btn-link btn-default text-muted o_activity_edit o_activity_link" t-att-data-activity-id="activity.id">
+                            <a role="button" href="#" class="btn btn-link btn-secondary text-muted o_activity_edit o_activity_link" t-att-data-activity-id="activity.id">
                                 <i class="fa fa-pencil"/> Edit
                             </a>
                             <a role="button" href="#" class="btn btn-link btn-danger text-muted o_activity_unlink o_activity_link" t-att-data-activity-id="activity.id">
diff --git a/addons/mail/static/src/xml/discuss.xml b/addons/mail/static/src/xml/discuss.xml
index f46c5a12300..b11ccd5ce93 100644
--- a/addons/mail/static/src/xml/discuss.xml
+++ b/addons/mail/static/src/xml/discuss.xml
@@ -182,15 +182,15 @@
     <t t-name="mail.discuss.ControlButtons">
         <div>
             <button type="button" class="btn btn-primary o_mail_discuss_button_invite d-none d-md-inline-block" title="Invite people">Invite</button>
-            <button type="button" class="btn btn-default o_mail_discuss_button_mark_all_read d-none d-md-inline-block" title="Mark all as read">Mark all read</button>
-            <button type="button" class="btn btn-default o_mail_discuss_button_unstar_all" title="Unstar all messages">Unstar all</button>
-            <button type="button" class="btn btn-default o_mail_discuss_button_dm d-block d-md-none" title="New Message">New Message</button>
-            <button t-if="!disableAddThread" type="button" class="btn btn-default o_mail_discuss_button_public o_mail_discuss_button_private d-block d-md-none" title="New Channel">New Channel</button>
-            <button type="button" class="btn btn-default o_hidden o_mail_discuss_button_select_all" title="Select all messages to moderate">Select All</button>
-            <button type="button" class="btn btn-default o_hidden o_mail_discuss_button_unselect_all" title="Unselect all messages to moderate">Unselect All</button>
-            <button type="button" data-decision="accept" class="btn btn-default o_mail_discuss_button_moderate_all" title="Accept selected messages">Accept</button>
-            <button type="button" data-decision="reject" class="btn btn-default o_mail_discuss_button_moderate_all" title="Reject selected messages">Reject</button>
-            <button type="button" data-decision="discard" class="btn btn-default o_mail_discuss_button_moderate_all" title="Discard selected messages">Discard</button>
+            <button type="button" class="btn btn-secondary o_mail_discuss_button_mark_all_read d-none d-md-inline-block" title="Mark all as read">Mark all read</button>
+            <button type="button" class="btn btn-secondary o_mail_discuss_button_unstar_all" title="Unstar all messages">Unstar all</button>
+            <button type="button" class="btn btn-secondary o_mail_discuss_button_dm d-block d-md-none" title="New Message">New Message</button>
+            <button t-if="!disableAddThread" type="button" class="btn btn-secondary o_mail_discuss_button_public o_mail_discuss_button_private d-block d-md-none" title="New Channel">New Channel</button>
+            <button type="button" class="btn btn-secondary o_hidden o_mail_discuss_button_select_all" title="Select all messages to moderate">Select All</button>
+            <button type="button" class="btn btn-secondary o_hidden o_mail_discuss_button_unselect_all" title="Unselect all messages to moderate">Unselect All</button>
+            <button type="button" data-decision="accept" class="btn btn-secondary o_mail_discuss_button_moderate_all" title="Accept selected messages">Accept</button>
+            <button type="button" data-decision="reject" class="btn btn-secondary o_mail_discuss_button_moderate_all" title="Reject selected messages">Reject</button>
+            <button type="button" data-decision="discard" class="btn btn-secondary o_mail_discuss_button_moderate_all" title="Discard selected messages">Discard</button>
         </div>
     </t>
 
@@ -211,7 +211,7 @@
                 <button type="button" class="btn btn-primary d-inline d-md-none o_mailbox_inbox_item" title="Inbox" data-type="mailbox_inbox">
                     Inbox
                 </button>
-                <button type="button" class="btn btn-default d-inline d-md-none o_mailbox_inbox_item" title="Starred" data-type="mailbox_starred">
+                <button type="button" class="btn btn-secondary d-inline d-md-none o_mailbox_inbox_item" title="Starred" data-type="mailbox_starred">
                     Starred
                 </button>
             </div>
diff --git a/addons/mail/static/src/xml/systray.xml b/addons/mail/static/src/xml/systray.xml
index 2f506b926df..1f0cf850f8c 100644
--- a/addons/mail/static/src/xml/systray.xml
+++ b/addons/mail/static/src/xml/systray.xml
@@ -12,7 +12,7 @@
             <ul class="o_mail_systray_dropdown dropdown-menu" role="menu">
                 <li role="menuitem" t-if="widget.isMobile()">
                     <div class="o_mail_systray_mobile_header">
-                        <button type="button" class="btn btn-default o_new_message"> New message </button>
+                        <button type="button" class="btn btn-secondary o_new_message"> New message </button>
                     </div>
                 </li>
                 <li role="menuitem" t-if="!widget.isMobile()" class="o_mail_systray_dropdown_top">
diff --git a/addons/mail/static/tests/discuss_moderation_tests.js b/addons/mail/static/tests/discuss_moderation_tests.js
index f4b1994532b..8940efa1185 100644
--- a/addons/mail/static/tests/discuss_moderation_tests.js
+++ b/addons/mail/static/tests/discuss_moderation_tests.js
@@ -507,7 +507,7 @@ QUnit.test('moderator: discard pending moderation message (reject without explan
             "should have two buttons in the footer of the dialog");
         assert.strictEqual($('.modal-footer button.btn-primary').text(), "Ok",
             "should have a confirm button in the dialog for discard");
-        assert.strictEqual($('.modal-footer button.btn-default').text(), "Cancel",
+        assert.strictEqual($('.modal-footer button.btn-secondary').text(), "Cancel",
             "should have a cancel button in the dialog for discard");
 
         // discard mesage
diff --git a/addons/mail/views/mail_activity_views.xml b/addons/mail/views/mail_activity_views.xml
index a6998e95e29..994acd94699 100644
--- a/addons/mail/views/mail_activity_views.xml
+++ b/addons/mail/views/mail_activity_views.xml
@@ -115,9 +115,9 @@
                         <button string="Schedule" name="action_close_dialog"
                             type="object" class="btn-primary"/>
                         <button string="Mark as Done" name="action_done"
-                            type="object" class="btn-default"/>
-                        <button string="Done &amp; Schedule Next" name="action_done_schedule_next" type="object" class="btn-default"/>
-                        <button string="Discard" class="btn-default" special="cancel" />
+                            type="object" class="btn-secondary"/>
+                        <button string="Done &amp; Schedule Next" name="action_done_schedule_next" type="object" class="btn-secondary"/>
+                        <button string="Discard" class="btn-secondary" special="cancel" />
                     </footer>
                 </sheet>
             </form>
diff --git a/addons/mail/views/mail_channel_views.xml b/addons/mail/views/mail_channel_views.xml
index df471961845..f73e88954ec 100644
--- a/addons/mail/views/mail_channel_views.xml
+++ b/addons/mail/views/mail_channel_views.xml
@@ -68,7 +68,7 @@
                                         <field name="description"/>
                                     </p>
                                     <button type="object" attrs="{'invisible':['|', ('is_subscribed','=',True), ('group_ids', '!=', [])]}" class="btn btn-primary pull-right" name="channel_join_and_get_info">Join</button>
-                                    <button type="object" attrs="{'invisible':['|', ('is_subscribed','=',False), ('group_ids', '!=', [])]}" class="btn btn-default pull-right" name="action_unfollow">Leave</button>
+                                    <button type="object" attrs="{'invisible':['|', ('is_subscribed','=',False), ('group_ids', '!=', [])]}" class="btn btn-secondary pull-right" name="action_unfollow">Leave</button>
                                 </div>
                             </div>
                         </t>
diff --git a/addons/mail/wizard/email_template_preview_view.xml b/addons/mail/wizard/email_template_preview_view.xml
index 67068f5dc84..bbf2e1811da 100644
--- a/addons/mail/wizard/email_template_preview_view.xml
+++ b/addons/mail/wizard/email_template_preview_view.xml
@@ -29,7 +29,7 @@
                             nolabel="1" options='{"safe": True}'/>
                     <field name="attachment_ids" widget="many2many_binary" readonly="1"/>
                     <footer>
-                        <button string="Discard" class="btn-default" special="cancel"/>
+                        <button string="Discard" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/mail/wizard/invite_view.xml b/addons/mail/wizard/invite_view.xml
index d64e10f387d..aa8633d225d 100644
--- a/addons/mail/wizard/invite_view.xml
+++ b/addons/mail/wizard/invite_view.xml
@@ -25,7 +25,7 @@
                     <footer>
                         <button string="Add Followers"
                             name="add_followers" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/mail/wizard/mail_compose_message_view.xml b/addons/mail/wizard/mail_compose_message_view.xml
index 9995bc15f04..5ca2a1bd494 100644
--- a/addons/mail/wizard/mail_compose_message_view.xml
+++ b/addons/mail/wizard/mail_compose_message_view.xml
@@ -76,10 +76,10 @@
                     <footer>
                         <button string="Send" attrs="{'invisible': [('is_log', '=', True)]}" name="send_mail_action" type="object" class="btn-primary o_mail_send"/>
                         <button string="Log" attrs="{'invisible': [('is_log', '=', False)]}" name="send_mail_action" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
 
                         <button icon="fa-lg fa-save" type="object" name="save_as_template" string="Save as new template"
-                                class="pull-right btn-default" help="Save as a new template"/>
+                                class="pull-right btn-secondary" help="Save as a new template"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/mail/wizard/mail_resend_message_views.xml b/addons/mail/wizard/mail_resend_message_views.xml
index 7d30bcfcfdc..045cfe7b7f6 100644
--- a/addons/mail/wizard/mail_resend_message_views.xml
+++ b/addons/mail/wizard/mail_resend_message_views.xml
@@ -23,8 +23,8 @@
                     <p attrs="{'invisible':[('has_cancel', '==', False)]}"> <span class="fa fa-info-circle"/> Caution: It won't be possible to send this mail again to the recipients you did not select.</p>
                     <footer>
                         <button string="Resend to selected" name="resend_mail_action" type="object" class="btn-primary o_mail_send"/>
-                        <button string="Ignore all failures" name="cancel_mail_action" type="object" class="btn-default" />
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Ignore all failures" name="cancel_mail_action" type="object" class="btn-secondary" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
@@ -41,7 +41,7 @@
                     <img src="/mail/static/img/red_envelope.png" alt="Envelope Example"/>
                     <footer>  
                         <button string="Discard delivery failures" name="cancel_resend_action" type="object" class="btn-primary" />
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/mass_mailing/views/mass_mailing_views.xml b/addons/mass_mailing/views/mass_mailing_views.xml
index 75a3d9b8d03..b0f1e7cc44e 100644
--- a/addons/mass_mailing/views/mass_mailing_views.xml
+++ b/addons/mass_mailing/views/mass_mailing_views.xml
@@ -278,7 +278,7 @@
                     </group>
                     <footer>
                         <button string="Create" name="close_dialog" type="object" class="btn-primary"/>
-                        <button string="Discard" class="btn-default" special="cancel"/>
+                        <button string="Discard" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
@@ -413,9 +413,9 @@
                     <header style="min-height:31px;">
                         <button name="put_in_queue" type="object" attrs="{'invisible': [('state', 'in', ('in_queue', 'done'))]}" class="oe_highlight" string="Send Now"
                             confirm="This will send the email to all recipients. Do you still want to proceed ?"/>
-                        <button name="action_schedule_date" type="object" attrs="{'invisible': [('state', 'in', ('in_queue', 'done'))]}" class="btn-default" string="Schedule"/>
-                        <button name="action_test_mailing" type="object" class="btn-default" string="Test"/>
-                        <button name="cancel_mass_mailing" type="object" attrs="{'invisible': [('state', '!=', 'in_queue')]}" class="btn-default" string="Cancel"/>
+                        <button name="action_schedule_date" type="object" attrs="{'invisible': [('state', 'in', ('in_queue', 'done'))]}" class="btn-secondary" string="Schedule"/>
+                        <button name="action_test_mailing" type="object" class="btn-secondary" string="Test"/>
+                        <button name="cancel_mass_mailing" type="object" attrs="{'invisible': [('state', '!=', 'in_queue')]}" class="btn-secondary" string="Cancel"/>
                         <button name="retry_failed_mail" type="object" attrs="{'invisible': ['|', ('state', '!=', 'done'), ('failed', '=', 0)]}" class="oe_highlight" string="Retry"/>
 
                         <field name="state" readonly="1" widget="statusbar"/>
diff --git a/addons/mass_mailing/wizard/mass_mailing_list_merge_views.xml b/addons/mass_mailing/wizard/mass_mailing_list_merge_views.xml
index a199e82ff1c..12e84d21ada 100644
--- a/addons/mass_mailing/wizard/mass_mailing_list_merge_views.xml
+++ b/addons/mass_mailing/wizard/mass_mailing_list_merge_views.xml
@@ -20,7 +20,7 @@
                 </field>
                 <footer>
                     <button name="action_mailing_lists_merge" type="object" string="Merge" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/mass_mailing/wizard/mass_mailing_schedule_date_views.xml b/addons/mass_mailing/wizard/mass_mailing_schedule_date_views.xml
index b0e1aabe884..46b3244dbb4 100644
--- a/addons/mass_mailing/wizard/mass_mailing_schedule_date_views.xml
+++ b/addons/mass_mailing/wizard/mass_mailing_schedule_date_views.xml
@@ -12,7 +12,7 @@
                 </group>
                 <footer>
                     <button string="Schedule" name="set_schedule_date" type="object" class="btn-primary"/>
-                    <button string="Discard " class="btn-default" special="cancel" />
+                    <button string="Discard " class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/mass_mailing/wizard/test_mailing_views.xml b/addons/mass_mailing/wizard/test_mailing_views.xml
index 8b69bc0a4b1..b8d9640a88c 100644
--- a/addons/mass_mailing/wizard/test_mailing_views.xml
+++ b/addons/mass_mailing/wizard/test_mailing_views.xml
@@ -14,7 +14,7 @@
                     </group>
                     <footer>
                         <button string="Send Sample Mail" name="send_mail_test" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/membership/wizard/membership_invoice_views.xml b/addons/membership/wizard/membership_invoice_views.xml
index 366cbe14c61..7c980f68806 100644
--- a/addons/membership/wizard/membership_invoice_views.xml
+++ b/addons/membership/wizard/membership_invoice_views.xml
@@ -12,7 +12,7 @@
                     </group>
                     <footer>
                         <button string="Invoice Membership" name="membership_invoice" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/mrp/wizard/change_production_qty_views.xml b/addons/mrp/wizard/change_production_qty_views.xml
index f731d2cecc1..ff7c878a58b 100644
--- a/addons/mrp/wizard/change_production_qty_views.xml
+++ b/addons/mrp/wizard/change_production_qty_views.xml
@@ -15,7 +15,7 @@
                     <footer>
                         <button name="change_prod_qty" string="Approve"
                             colspan="1" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/mrp/wizard/mrp_product_produce_views.xml b/addons/mrp/wizard/mrp_product_produce_views.xml
index f17e5dc9c0e..25da6fe1931 100644
--- a/addons/mrp/wizard/mrp_product_produce_views.xml
+++ b/addons/mrp/wizard/mrp_product_produce_views.xml
@@ -36,7 +36,7 @@
                     </group>
                     <footer>
                         <button name="do_produce" type="object" string="Record Production" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/mrp/wizard/mrp_workcenter_block_view.xml b/addons/mrp/wizard/mrp_workcenter_block_view.xml
index 01bc051de3a..5a45c5bfe90 100644
--- a/addons/mrp/wizard/mrp_workcenter_block_view.xml
+++ b/addons/mrp/wizard/mrp_workcenter_block_view.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="button_block" string="Block" type="object" class="btn-danger text-uppercase"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/payment/views/payment_templates.xml b/addons/payment/views/payment_templates.xml
index 8e53474d549..b0a733a7fad 100644
--- a/addons/payment/views/payment_templates.xml
+++ b/addons/payment/views/payment_templates.xml
@@ -141,7 +141,7 @@
                 </t>
             </div>
             <div t-if='back_button_txt' class="pull-left">
-                <a role="button" t-att-href="back_button_link or '#'" t-att-class="back_button_class or 'btn btn-lg btn-default'">
+                <a role="button" t-att-href="back_button_link or '#'" t-att-class="back_button_class or 'btn btn-lg btn-secondary'">
                     <i t-if="back_button_icon_class" t-attf-class="fa {{back_button_icon_class}}"/>
                     <t t-esc="back_button_txt"/>
                 </a>
diff --git a/addons/payment/views/payment_views.xml b/addons/payment/views/payment_views.xml
index b7fc6500ff0..a6df192a446 100644
--- a/addons/payment/views/payment_views.xml
+++ b/addons/payment/views/payment_views.xml
@@ -153,7 +153,7 @@
                                     <t t-if="installed">
                                         <field name="environment" widget="label_selection" options="{'classes': {'test': 'warning', 'production': 'success'}}"/>
                                     </t>
-                                    <button t-if="!installed" type="object" class="btn btn-default pull-right" name="button_immediate_install">Install</button>
+                                    <button t-if="!installed" type="object" class="btn btn-secondary pull-right" name="button_immediate_install">Install</button>
                                     <button t-if="installed and !record.website_published.raw_value" type="edit" class="btn btn-primary pull-right">Activate</button>
                                     <button t-if="installed and record.website_published.raw_value" type="edit" class="btn btn-primary pull-right">Configure</button>
                                 </div>
diff --git a/addons/point_of_sale/views/point_of_sale_dashboard.xml b/addons/point_of_sale/views/point_of_sale_dashboard.xml
index b87f14b3b12..ec80fe84365 100644
--- a/addons/point_of_sale/views/point_of_sale_dashboard.xml
+++ b/addons/point_of_sale/views/point_of_sale_dashboard.xml
@@ -92,7 +92,7 @@
 
                                         <button t-if="record.current_session_state.raw_value === 'opening_control'" class="btn btn-primary" name="open_existing_session_cb" type="object">Open Session</button>
 
-                                        <button t-if="_.contains(['opened', 'closing_control'], record.current_session_state.raw_value)" class="btn btn-default" name="open_existing_session_cb" type="object">Close</button>
+                                        <button t-if="_.contains(['opened', 'closing_control'], record.current_session_state.raw_value)" class="btn btn-secondary" name="open_existing_session_cb" type="object">Close</button>
 
                                         <button t-if="!record.current_session_id.raw_value &amp;&amp; !record.pos_session_username.value" class="btn btn-primary" name="open_session_cb" type="object">New Session</button>
 
diff --git a/addons/point_of_sale/wizard/pos_details.xml b/addons/point_of_sale/wizard/pos_details.xml
index 6e1eb5f5ae3..596ba509825 100644
--- a/addons/point_of_sale/wizard/pos_details.xml
+++ b/addons/point_of_sale/wizard/pos_details.xml
@@ -14,7 +14,7 @@
                     </group>
                     <footer>
                         <button name="generate_report" string="Print" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/point_of_sale/wizard/pos_discount.xml b/addons/point_of_sale/wizard/pos_discount.xml
index e060a7900ab..ff466c2dadc 100644
--- a/addons/point_of_sale/wizard/pos_discount.xml
+++ b/addons/point_of_sale/wizard/pos_discount.xml
@@ -10,7 +10,7 @@
                     </group>
                     <footer>
                         <button name="apply_discount" string="Apply Discount" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/point_of_sale/wizard/pos_open_statement.xml b/addons/point_of_sale/wizard/pos_open_statement.xml
index 264b4d6cb35..369e610c588 100644
--- a/addons/point_of_sale/wizard/pos_open_statement.xml
+++ b/addons/point_of_sale/wizard/pos_open_statement.xml
@@ -9,7 +9,7 @@
                     <span class="o_form_label">The system will open all cash registers, so that you can start recording payments. We suggest you to control the opening balance of each register, using their CashBox tab.</span>
                     <footer>
                         <button name="open_statement" type="object" string="Open Registers" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/point_of_sale/wizard/pos_payment.xml b/addons/point_of_sale/wizard/pos_payment.xml
index a00ad3957db..9cea3f6aae7 100644
--- a/addons/point_of_sale/wizard/pos_payment.xml
+++ b/addons/point_of_sale/wizard/pos_payment.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="check" string="Make Payment" type="object" class="btn-primary"/>
-                    <button special="cancel" string="Cancel" class="btn-default"/>
+                    <button special="cancel" string="Cancel" class="btn-secondary"/>
                 </footer>
             </form>
             </field>
diff --git a/addons/portal/static/src/scss/portal.scss b/addons/portal/static/src/scss/portal.scss
index 6e8ca8dd7a9..faf5942d121 100644
--- a/addons/portal/static/src/scss/portal.scss
+++ b/addons/portal/static/src/scss/portal.scss
@@ -306,7 +306,6 @@ img.o_we_custom_image {
                 margin-bottom: 0;
                 background-color: $table-bg-active;
                 padding: 6px 10px $navbar-padding-vertical;
-                border: 1px solid $btn-default-border;
                 border-width: 1px 1px 0 1px;
                 border-bottom-left-radius: 0;
                 border-bottom-right-radius: 0;
@@ -323,7 +322,6 @@ img.o_we_custom_image {
             @include media-breakpoint-down(sm) {
                 .navbar-collapse {
                     z-index: 0;
-                    box-shadow: inset 0 0 0 1px $btn-default-border;
                     background-color: $table-bg-active;
                     border-radius: $btn-border-radius-base;
                     border-top-right-radius: 0;
diff --git a/addons/portal/views/portal_templates.xml b/addons/portal/views/portal_templates.xml
index c061465cebd..89bc191cf32 100644
--- a/addons/portal/views/portal_templates.xml
+++ b/addons/portal/views/portal_templates.xml
@@ -100,7 +100,7 @@
                                     <t t-call="portal.portal_contact"/>
                                 </div>
                                 <div class="o_portal_my_details">
-                                    <h3 class="page-header">Your Details <a role="button" href="/my/account" class="btn btn-default btn-xs">Change</a></h3>
+                                    <h3 class="page-header">Your Details <a role="button" href="/my/account" class="btn btn-secondary btn-xs">Change</a></h3>
                                     <div t-field="user_id.partner_id" t-options='{"widget": "contact", "fields": ["email", "phone", "address", "name"]}'/>
                                 </div>
                                 <div class="o_my_archives" t-if="archive_groups">
@@ -175,7 +175,7 @@
                     <ul class="nav pull-left">
                         <t t-raw="0"/>
                         <li t-if="searchbar_sortings" class="dropdown pull-left ml16">
-                            <button id="portal_searchbar_sortby" data-toggle="dropdown" class="btn btn-default navbar-btn">
+                            <button id="portal_searchbar_sortby" data-toggle="dropdown" class="btn btn-secondary navbar-btn">
                                 <span class="fa fa-sort"/>
                                 <span class="d-none d-lg-inline"><t t-esc="searchbar_sortings[sortby].get('label', 'Newest')"/></span>
                                 <span class="caret"/>
@@ -189,7 +189,7 @@
                             </ul>
                         </li>
                         <li t-if="searchbar_filters" class="dropdown pull-left ml4">
-                            <button id="portal_searchbar_filters" data-toggle="dropdown" class="btn btn-default navbar-btn">
+                            <button id="portal_searchbar_filters" data-toggle="dropdown" class="btn btn-secondary navbar-btn">
                                 <span class="fa fa-filter"/>
                                 <span class="d-none d-lg-inline"><t t-esc="searchbar_filters[filterby].get('label', 'All')"/></span>
                                 <span class="caret"/>
@@ -203,7 +203,7 @@
                             </ul>
                         </li>
                         <li t-if="searchbar_groupby" class="dropdown pull-left ml4">
-                            <button id="portal_searchbar_groupby" data-toggle="dropdown" class="btn btn-default navbar-btn">
+                            <button id="portal_searchbar_groupby" data-toggle="dropdown" class="btn btn-secondary navbar-btn">
                                 <span class="fa fa-object-group"/>
                                 <span class="d-none d-lg-inline"><t t-esc="searchbar_groupby[groupby].get('label', 'None')"/></span>
                                 <span class="caret"/>
@@ -226,7 +226,7 @@
                     <div class="navbar-form o_portal_search_panel">
                          <div class="input-group">
                             <div class="input-group-btn">
-                                <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
+                                <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown">
                                     <span id="search_label" class="d-none d-md-inline mr4">Search</span><span class="caret"></span>
                                 </button>
                                 <ul class="dropdown-menu" role="menu">
@@ -237,7 +237,7 @@
                             </div>
                             <input type="text" class="form-control" t-att-value='search' name="search"/>
                             <span class="input-group-btn">
-                                <button class="btn btn-default search-submit" type="button"><span class="fa fa-search d-none d-md-inline-block"/><span class="fa fa-arrow-right d-inline-block d-md-none"/></button>
+                                <button class="btn btn-secondary search-submit" type="button"><span class="fa fa-search d-none d-md-inline-block"/><span class="fa fa-arrow-right d-inline-block d-md-none"/></button>
                             </span>
                         </div>
                     </div>
@@ -362,8 +362,8 @@
     <template id="record_pager" name="Portal Record Pager">
         <t t-if='prev_record or next_record'>
           <div class="ml8 record_pager btn-group btn-group-xs pull-right" role="group">
-            <a role="button" t-att-class="'btn btn-default %s' % ('disabled' if not prev_record else '')" t-att-href="prev_record or '#'" ><i class="fa fa-arrow-left" role="img" aria-label="Previous" title="Previous"></i></a>
-            <a role="button" t-att-class="'btn btn-default %s' % ('disabled' if not next_record else '')" t-att-href="next_record or '#'" ><i class="fa fa-arrow-right" role="img" aria-label="Next" title="Previous"></i></a>
+            <a role="button" t-att-class="'btn btn-secondary %s' % ('disabled' if not prev_record else '')" t-att-href="prev_record or '#'" ><i class="fa fa-arrow-left" role="img" aria-label="Previous" title="Previous"></i></a>
+            <a role="button" t-att-class="'btn btn-secondary %s' % ('disabled' if not next_record else '')" t-att-href="next_record or '#'" ><i class="fa fa-arrow-right" role="img" aria-label="Next" title="Previous"></i></a>
           </div>
         </t>
     </template>
diff --git a/addons/portal/wizard/portal_wizard_views.xml b/addons/portal/wizard/portal_wizard_views.xml
index 05896b77748..a39c48e6a31 100644
--- a/addons/portal/wizard/portal_wizard_views.xml
+++ b/addons/portal/wizard/portal_wizard_views.xml
@@ -31,7 +31,7 @@
                         placeholder="This text is included in the email sent to new portal users."/>
                     <footer>
                         <button string="Apply" name="action_apply" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/product/wizard/product_price_list_views.xml b/addons/product/wizard/product_price_list_views.xml
index 96edadb4c49..d1c3a4b76fe 100644
--- a/addons/product/wizard/product_price_list_views.xml
+++ b/addons/product/wizard/product_price_list_views.xml
@@ -17,7 +17,7 @@
                     </group>
                     <footer>
                         <button name="print_report" string="Print"  type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
               </field>
diff --git a/addons/product_margin/wizard/product_margin_view.xml b/addons/product_margin/wizard/product_margin_view.xml
index 689021f99fa..745009a4b4e 100644
--- a/addons/product_margin/wizard/product_margin_view.xml
+++ b/addons/product_margin/wizard/product_margin_view.xml
@@ -12,7 +12,7 @@
                     </group>
                     <footer>
                         <button name="action_open_window" string="Open Margins" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/project/views/project_portal_templates.xml b/addons/project/views/project_portal_templates.xml
index 006b9ec4a0e..820d59ccf7b 100644
--- a/addons/project/views/project_portal_templates.xml
+++ b/addons/project/views/project_portal_templates.xml
@@ -101,7 +101,7 @@
                         </div>
                         <div class="col-md-6">
                             <div class="pull-right">
-                                <a role="button" t-attf-href="/my/tasks?filterby=#{project.id}" class="btn btn-default btn-lg">
+                                <a role="button" t-attf-href="/my/tasks?filterby=#{project.id}" class="btn btn-secondary btn-lg">
                                     <span class="fa fa-tasks" role="img" aria-label="Tasks" title="Tasks"/>
                                     <span t-esc="project.task_count" />
                                     <span t-field="project.label_tasks" />
diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index fec5d2d0bbb..de6663ec65d 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -265,7 +265,7 @@
                     </group>
                     <footer>
                         <button string="Create" name="open_tasks" type="object" class="btn-primary o_open_tasks"/>
-                        <button string="Discard" class="btn-default" special="cancel"/>
+                        <button string="Discard" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/repair/wizard/repair_cancel.py b/addons/repair/wizard/repair_cancel.py
index eceb6bcb97e..ba3d8bce85b 100644
--- a/addons/repair/wizard/repair_cancel.py
+++ b/addons/repair/wizard/repair_cancel.py
@@ -33,7 +33,7 @@ class RepairCancel(models.TransientModel):
                 <form string="Cancel Repair">
                     <header>
                         <button name="cancel_repair" string="_Yes" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </header>
                     <label string="Do you want to continue?"/>
                 </form>
diff --git a/addons/repair/wizard/repair_cancel_views.xml b/addons/repair/wizard/repair_cancel_views.xml
index 9836653bfa8..be423577d2f 100644
--- a/addons/repair/wizard/repair_cancel_views.xml
+++ b/addons/repair/wizard/repair_cancel_views.xml
@@ -14,7 +14,7 @@
                     </group>
                     <footer>
                         <button name="cancel_repair" string="Yes" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/repair/wizard/repair_make_invoice_views.xml b/addons/repair/wizard/repair_make_invoice_views.xml
index dab17044305..0196208e2ac 100644
--- a/addons/repair/wizard/repair_make_invoice_views.xml
+++ b/addons/repair/wizard/repair_make_invoice_views.xml
@@ -14,7 +14,7 @@
                 </group>
                 <footer>
                     <button name="make_invoices" string="Create Invoice" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
             </field>
diff --git a/addons/sale/wizard/sale_make_invoice_advance_views.xml b/addons/sale/wizard/sale_make_invoice_advance_views.xml
index 5cf44b9a7d5..04330803434 100644
--- a/addons/sale/wizard/sale_make_invoice_advance_views.xml
+++ b/addons/sale/wizard/sale_make_invoice_advance_views.xml
@@ -34,7 +34,7 @@
                             context="{'open_invoices': True}" class="btn-primary"/>
                         <button name="create_invoices" string="Create Invoices" type="object"
                             class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/sale_timesheet/wizard/project_create_invoice_views.xml b/addons/sale_timesheet/wizard/project_create_invoice_views.xml
index 3eb5a23a671..6658ce34b28 100644
--- a/addons/sale_timesheet/wizard/project_create_invoice_views.xml
+++ b/addons/sale_timesheet/wizard/project_create_invoice_views.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button string="Create Invoice" type="object" name="action_create_invoice" class="oe_highlight"/>
-                    <button string="Cancel" special="cancel" type="object" class="btn btn-default oe_inline"/>
+                    <button string="Cancel" special="cancel" type="object" class="btn btn-secondary oe_inline"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/sale_timesheet/wizard/project_create_sale_order_views.xml b/addons/sale_timesheet/wizard/project_create_sale_order_views.xml
index 306f9e335f2..f942f66d4ee 100644
--- a/addons/sale_timesheet/wizard/project_create_sale_order_views.xml
+++ b/addons/sale_timesheet/wizard/project_create_sale_order_views.xml
@@ -17,7 +17,7 @@
                 </group>
                 <footer>
                     <button string="Create Sales Order" type="object" name="action_create_sale_order" class="oe_highlight"/>
-                    <button string="Cancel" special="cancel" type="object" class="btn btn-default oe_inline"/>
+                    <button string="Cancel" special="cancel" type="object" class="btn btn-secondary oe_inline"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/sale_timesheet/wizard/project_task_assign_so_line_views.xml b/addons/sale_timesheet/wizard/project_task_assign_so_line_views.xml
index 8bc70807a6c..e28f411c8b6 100644
--- a/addons/sale_timesheet/wizard/project_task_assign_so_line_views.xml
+++ b/addons/sale_timesheet/wizard/project_task_assign_so_line_views.xml
@@ -13,7 +13,7 @@
 				</group>
 				<footer>
 					<button string="Assign" type="object" name="action_assign_sale_line" class="oe_highlight"/>
-					<button string="Cancel" special="cancel" type="object" class="btn btn-default oe_inline"/>
+					<button string="Cancel" special="cancel" type="object" class="btn btn-secondary oe_inline"/>
 				</footer>
 			</form>
 		</field>
diff --git a/addons/stock/views/stock_scrap_views.xml b/addons/stock/views/stock_scrap_views.xml
index 365442903e4..ac91b1b8417 100644
--- a/addons/stock/views/stock_scrap_views.xml
+++ b/addons/stock/views/stock_scrap_views.xml
@@ -167,7 +167,7 @@
                     </group>
                     <footer>
                         <button name="action_validate" string="Done" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/stock/wizard/product_replenish_views.xml b/addons/stock/wizard/product_replenish_views.xml
index f1337e2db57..c66d8da5922 100644
--- a/addons/stock/wizard/product_replenish_views.xml
+++ b/addons/stock/wizard/product_replenish_views.xml
@@ -38,7 +38,7 @@
                         type="object" 
                         class="btn-primary"/>
                     <button string="Discard" 
-                        class="btn-default"
+                        class="btn-secondary"
                         special="cancel" />
                 </footer>
             </form>
diff --git a/addons/stock/wizard/stock_backorder_confirmation_views.xml b/addons/stock/wizard/stock_backorder_confirmation_views.xml
index dfd205c8c6e..586c0513df9 100644
--- a/addons/stock/wizard/stock_backorder_confirmation_views.xml
+++ b/addons/stock/wizard/stock_backorder_confirmation_views.xml
@@ -17,7 +17,7 @@
                 <footer>
                     <button name="process" string="Create Backorder" type="object" class="oe_highlight"/>
                     <button name="process_cancel_backorder" string="No Backorder" type="object" class="btn-primary"/>
-                    <button string="_Cancel" class="btn-default" special="cancel" />
+                    <button string="_Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_change_product_qty_views.xml b/addons/stock/wizard/stock_change_product_qty_views.xml
index 42e72434c23..d0260e9ee92 100644
--- a/addons/stock/wizard/stock_change_product_qty_views.xml
+++ b/addons/stock/wizard/stock_change_product_qty_views.xml
@@ -18,7 +18,7 @@
                     </group>
                     <footer>
                         <button name="change_product_qty" string="_Apply" type="object" class="btn-primary"/>
-                        <button string="_Cancel" class="btn-default" special="cancel" />
+                        <button string="_Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/stock/wizard/stock_immediate_transfer_views.xml b/addons/stock/wizard/stock_immediate_transfer_views.xml
index e84fb1f3fea..ba9988a94ec 100644
--- a/addons/stock/wizard/stock_immediate_transfer_views.xml
+++ b/addons/stock/wizard/stock_immediate_transfer_views.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="process" string="_Apply" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_overprocessed_transfer_views.xml b/addons/stock/wizard/stock_overprocessed_transfer_views.xml
index 196c767bcd0..8de8b95fdcd 100644
--- a/addons/stock/wizard/stock_overprocessed_transfer_views.xml
+++ b/addons/stock/wizard/stock_overprocessed_transfer_views.xml
@@ -14,7 +14,7 @@
                 </p>
                 <footer>
                     <button name="action_confirm" string="Confirm" type="object" class="btn-primary"/>
-                    <button string="Cancel" special="cancel" class="btn-default"/>
+                    <button string="Cancel" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_picking_return_views.xml b/addons/stock/wizard/stock_picking_return_views.xml
index cc4dd2de9a3..3bbba44a176 100644
--- a/addons/stock/wizard/stock_picking_return_views.xml
+++ b/addons/stock/wizard/stock_picking_return_views.xml
@@ -31,7 +31,7 @@
                 </group>
                 <footer>
                     <button name="create_returns" string="Return" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_quantity_history.xml b/addons/stock/wizard/stock_quantity_history.xml
index d4d2c4aa494..378fde286e7 100644
--- a/addons/stock/wizard/stock_quantity_history.xml
+++ b/addons/stock/wizard/stock_quantity_history.xml
@@ -13,7 +13,7 @@
                 </group>
                 <footer>
                     <button name="open_table" string="Retrieve the Inventory Quantities" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_scheduler_compute_views.xml b/addons/stock/wizard/stock_scheduler_compute_views.xml
index bf208c12917..023c1bfb6d8 100644
--- a/addons/stock/wizard/stock_scheduler_compute_views.xml
+++ b/addons/stock/wizard/stock_scheduler_compute_views.xml
@@ -11,7 +11,7 @@
                 </p>
                 <footer>
                     <button name="procure_calculation" string="Run Schedulers" type="object" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel" />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_track_confirmation_views.xml b/addons/stock/wizard/stock_track_confirmation_views.xml
index 41955fc86d5..cc257a84301 100644
--- a/addons/stock/wizard/stock_track_confirmation_views.xml
+++ b/addons/stock/wizard/stock_track_confirmation_views.xml
@@ -16,7 +16,7 @@
                 </field>
                 <footer>
                     <button name="action_confirm" string="Confirm" type="object" class="btn-primary"/>
-                    <button string="Discard" special="cancel" class="btn-default"/>
+                    <button string="Discard" special="cancel" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/stock/wizard/stock_warn_insufficient_qty_views.xml b/addons/stock/wizard/stock_warn_insufficient_qty_views.xml
index 8da08434081..f6fb8eee99e 100644
--- a/addons/stock/wizard/stock_warn_insufficient_qty_views.xml
+++ b/addons/stock/wizard/stock_warn_insufficient_qty_views.xml
@@ -29,7 +29,7 @@
                 </div>
                 <footer>
                     <button name="cancel_button" string="Discard" class="btn-primary" special="cancel"/>
-                    <button string="Confirm" name="action_done" type="object" class="btn-default"/>
+                    <button string="Confirm" name="action_done" type="object" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/stock_account/views/stock_account_views.xml b/addons/stock_account/views/stock_account_views.xml
index 1e3d84fc6b7..814ee2bbb0b 100644
--- a/addons/stock_account/views/stock_account_views.xml
+++ b/addons/stock_account/views/stock_account_views.xml
@@ -63,7 +63,7 @@
                     </group>
                     <footer>
                         <button name="open_table" string="Retrieve the inventory valuation" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/addons/stock_account/wizard/stock_change_standard_price_views.xml b/addons/stock_account/wizard/stock_change_standard_price_views.xml
index 01f4d61318a..3302e1a20fc 100644
--- a/addons/stock_account/wizard/stock_change_standard_price_views.xml
+++ b/addons/stock_account/wizard/stock_change_standard_price_views.xml
@@ -19,7 +19,7 @@
                   </group>
                   <footer>
                       <button name="change_price" string="_Apply" type="object" class="btn-primary"/>
-                      <button string="Cancel" class="btn-default" special="cancel" />
+                      <button string="Cancel" class="btn-secondary" special="cancel" />
                   </footer>
               </form>
             </field>
diff --git a/addons/stock_landed_costs/views/stock_landed_cost_views.xml b/addons/stock_landed_costs/views/stock_landed_cost_views.xml
index b904605ecd1..a618f8e21d2 100644
--- a/addons/stock_landed_costs/views/stock_landed_cost_views.xml
+++ b/addons/stock_landed_costs/views/stock_landed_cost_views.xml
@@ -63,7 +63,7 @@
                         </field>
                         <group class="oe_subtotal_footer oe_right">
                             <field name="amount_total" widget="monetary"/>
-                            <button colspan="2" name="compute_landed_cost" string="Compute" type="object" class="oe_right btn-default" states='draft'/>
+                            <button colspan="2" name="compute_landed_cost" string="Compute" type="object" class="oe_right btn-secondary" states='draft'/>
                         </group>
 
                         <div class="oe_clear"/>
diff --git a/addons/stock_picking_batch/wizard/stock_picking_to_batch_views.xml b/addons/stock_picking_batch/wizard/stock_picking_to_batch_views.xml
index dc45cf58269..da393c44972 100644
--- a/addons/stock_picking_batch/wizard/stock_picking_to_batch_views.xml
+++ b/addons/stock_picking_batch/wizard/stock_picking_to_batch_views.xml
@@ -11,7 +11,7 @@
                 <field name="batch_id" class="oe_inline" options="{'no_create_edit': True, 'no_open': True}"/>
                 <footer>
                     <button name="attach_pickings" type="object" string="Add to Batch" class="btn-primary"/>
-                    <button string="Cancel" class="btn-default" special="cancel"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                 </footer>
             </form>
         </field>
diff --git a/addons/survey/views/survey_templates.xml b/addons/survey/views/survey_templates.xml
index ec103a8867d..0434d60de4e 100644
--- a/addons/survey/views/survey_templates.xml
+++ b/addons/survey/views/survey_templates.xml
@@ -99,7 +99,7 @@
     <!-- Back Button to redirect in form view of survey -->
     <template id="back" name="Back">
         <div groups="website.group_website_publisher" t-ignore="true" class="pull-right">
-            <a role="button" t-attf-href="/web#view_type=form&amp;model=survey.survey&amp;id=#{survey.id}&amp;action=survey.action_survey_form" class="btn btn-default">Back to Survey</a>
+            <a role="button" t-attf-href="/web#view_type=form&amp;model=survey.survey&amp;id=#{survey.id}&amp;action=survey.action_survey_form" class="btn btn-secondary">Back to Survey</a>
         </div>
     </template>
 
@@ -201,7 +201,7 @@
                 </div>
             </t>
             <div class="text-center mt16 mb16">
-                <button t-if="survey.users_can_go_back and page_nr > 0" type="submit" class="btn btn-default" name="button_submit" value="previous">Previous page</button>
+                <button t-if="survey.users_can_go_back and page_nr > 0" type="submit" class="btn btn-secondary" name="button_submit" value="previous">Previous page</button>
                 <button t-if="not last" type="submit" class="btn btn-primary" name="button_submit" value="next">Next page</button>
                 <button t-if="last" type="submit" class="btn btn-primary" name="button_submit" value="finish">Submit survey</button>
             </div>
diff --git a/addons/survey/wizard/survey_email_compose_message.xml b/addons/survey/wizard/survey_email_compose_message.xml
index dee6315971f..167464896ba 100644
--- a/addons/survey/wizard/survey_email_compose_message.xml
+++ b/addons/survey/wizard/survey_email_compose_message.xml
@@ -56,7 +56,7 @@
                     </footer>
                     <footer attrs="{'invisible':['|',('public','=',False),('public','in',['public_link'])]}">
                         <button string="Send" name="send_mail_action" type="object" class="btn-primary" />
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                         <group class="oe_right" col="1">
                             <div>
                                 Use template
diff --git a/addons/theme_default/static/src/scss/option_color_amethyst.scss b/addons/theme_default/static/src/scss/option_color_amethyst.scss
index a0a7c914930..a5c9dbbac11 100644
--- a/addons/theme_default/static/src/scss/option_color_amethyst.scss
+++ b/addons/theme_default/static/src/scss/option_color_amethyst.scss
@@ -19,7 +19,7 @@
 .btn .fa {
 	color: white;}
 
-.btn-default .fa {
+.btn-secondary .fa {
 	color: $gray-dark;}
 
 /* TRANSPARENT BG --------------------------------------------------- */
diff --git a/addons/theme_default/static/src/scss/option_color_cobalt.scss b/addons/theme_default/static/src/scss/option_color_cobalt.scss
index ed3c6efb5c4..74d4f5cf00e 100644
--- a/addons/theme_default/static/src/scss/option_color_cobalt.scss
+++ b/addons/theme_default/static/src/scss/option_color_cobalt.scss
@@ -19,7 +19,7 @@
 .btn .fa {
 	color: white;}
 
-.btn-default .fa {
+.btn-secondary .fa {
 	color: $gray-dark;}
 
 /* TRANSPARENT BG --------------------------------------------------- */
diff --git a/addons/theme_default/static/src/scss/option_color_emerald.scss b/addons/theme_default/static/src/scss/option_color_emerald.scss
index d936425e1f2..0c9fc0b47db 100644
--- a/addons/theme_default/static/src/scss/option_color_emerald.scss
+++ b/addons/theme_default/static/src/scss/option_color_emerald.scss
@@ -19,7 +19,7 @@
 .btn .fa {
 	color: white;}
 
-.btn-default .fa {
+.btn-secondary .fa {
 	color: $gray-dark;}
 
 /* TRANSPARENT BG --------------------------------------------------- */
diff --git a/addons/theme_default/static/src/scss/option_color_gold.scss b/addons/theme_default/static/src/scss/option_color_gold.scss
index ba6fa843ec5..9f27adff25f 100644
--- a/addons/theme_default/static/src/scss/option_color_gold.scss
+++ b/addons/theme_default/static/src/scss/option_color_gold.scss
@@ -19,7 +19,7 @@
 .btn .fa {
 	color: white;}
 
-.btn-default .fa {
+.btn-secondary .fa {
 	color: $gray-dark;}
 
 /* TRANSPARENT BG --------------------------------------------------- */
diff --git a/addons/theme_default/static/src/scss/option_color_ruby.scss b/addons/theme_default/static/src/scss/option_color_ruby.scss
index e87f7168391..f1883a2e60f 100644
--- a/addons/theme_default/static/src/scss/option_color_ruby.scss
+++ b/addons/theme_default/static/src/scss/option_color_ruby.scss
@@ -19,7 +19,7 @@
 .btn .fa {
 	color: white;}
 
-.btn-default .fa {
+.btn-secondary .fa {
 	color: $gray-dark;}
 
 /* TRANSPARENT BG --------------------------------------------------- */
diff --git a/addons/web/static/src/js/core/dialog.js b/addons/web/static/src/js/core/dialog.js
index 847845ae17e..9cca9c1127a 100644
--- a/addons/web/static/src/js/core/dialog.js
+++ b/addons/web/static/src/js/core/dialog.js
@@ -40,7 +40,7 @@ var Dialog = Widget.extend({
      *        button is added to allow closing the dialog
      * @param {string} [options.buttons[].text]
      * @param {string} [options.buttons[].classes]
-     *        Default to 'btn-primary' if only one button, 'btn-default'
+     *        Default to 'btn-primary' if only one button, 'btn-secondary'
      *        otherwise
      * @param {boolean} [options.buttons[].close=false]
      * @param {function} [options.buttons[].click]
@@ -123,7 +123,7 @@ var Dialog = Widget.extend({
         _.each(buttons, function (buttonData) {
             var $button = dom.renderButton({
                 attrs: {
-                    class: buttonData.classes || (buttons.length > 1 ? 'btn-default' : 'btn-primary'),
+                    class: buttonData.classes || (buttons.length > 1 ? 'btn-secondary' : 'btn-primary'),
                     disabled: buttonData.disabled,
                 },
                 icon: buttonData.icon,
diff --git a/addons/web/static/src/js/core/dom.js b/addons/web/static/src/js/core/dom.js
index 81f5bfec5c0..ba3eebf9bea 100644
--- a/addons/web/static/src/js/core/dom.js
+++ b/addons/web/static/src/js/core/dom.js
@@ -208,7 +208,7 @@ return {
      * @param {Object} options
      * @param {Object} [options.attrs] - Attributes to put on the button element
      * @param {string} [options.attrs.type='button']
-     * @param {string} [options.attrs.class='btn-default']
+     * @param {string} [options.attrs.class='btn-secondary']
      *        Note: automatically completed with "btn btn-X"
      *        (@see options.size for the value of X)
      * @param {string} [options.size] - @see options.attrs.class
@@ -237,7 +237,7 @@ return {
         if (options.size) {
             jQueryParams.class += (' btn-' + options.size);
         }
-        jQueryParams.class += (' ' + (extraClasses || 'btn-default'));
+        jQueryParams.class += (' ' + (extraClasses || 'btn-secondary'));
 
         var $button = $('<button/>', jQueryParams);
 
diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index c1c458d1935..73bcc1f1f35 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -968,7 +968,7 @@ var FieldX2Many = AbstractField.extend({
     _renderButtons: function () {
         if (!this.isReadonly && this.view.arch.tag === 'kanban') {
             this.$buttons = $(qweb.render('KanbanView.buttons', {
-                btnClass: 'btn-default',
+                btnClass: 'btn-secondary',
                 create_text: this.nodeOptions.create_text,
             }));
             this.$buttons.on('click', 'button.o-kanban-button-new', this._onAddRecord.bind(this));
diff --git a/addons/web/static/src/js/views/form/form_renderer.js b/addons/web/static/src/js/views/form/form_renderer.js
index a96742bd0e2..5d4e2ad4cb5 100644
--- a/addons/web/static/src/js/views/form/form_renderer.js
+++ b/addons/web/static/src/js/views/form/form_renderer.js
@@ -159,9 +159,9 @@ var FormRenderer = BasicRenderer.extend({
             .removeAttr('disabled');
     },
     /**
-     * Put the focus on the last activated widget. 
+     * Put the focus on the last activated widget.
      * This function is used when closing a dialog to give the focus back to the
-     * form that has opened it and ensures that the focus is in the correct 
+     * form that has opened it and ensures that the focus is in the correct
      * field.
      */
     focusLastActivatedWidget: function () {
@@ -396,12 +396,13 @@ var FormRenderer = BasicRenderer.extend({
 
         // Current API of odoo for rendering buttons is "if classes are given
         // use those on top of the 'btn' and 'btn-{size}' classes, otherwise act
-        // as if 'btn-default' class was given". The problem is that, for header
-        // buttons only, we allowed users to only indicate their custom classes
-        // without having to explicitely ask for the 'btn-default' class to be
-        // added. We force it so here when no bootstrap btn type class is found.
-        if ($button.not('.btn-primary, .btn-default, .btn-link, .btn-success, .btn-info, .btn-warning, .btn-danger').length) {
-            $button.addClass('btn-default');
+        // as if 'btn-secondary' class was given". The problem is that, for
+        // header buttons only, we allowed users to only indicate their custom
+        // classes without having to explicitely ask for the 'btn-secondary'
+        // class to be added. We force it so here when no bootstrap btn type
+        // class is found.
+        if ($button.not('.btn-primary, .btn-secondary, .btn-link, .btn-success, .btn-info, .btn-warning, .btn-danger').length) {
+            $button.addClass('btn-secondary');
         }
 
         this._addOnClickAction($button, node);
@@ -858,7 +859,7 @@ var FormRenderer = BasicRenderer.extend({
         this.defs = defs;
         var $form = this._renderNode(this.arch).addClass(this.className);
         delete this.defs;
-        
+
         return $.when.apply($, defs).then(function () {
             self._updateView($form.contents());
         }, function () {
@@ -866,7 +867,7 @@ var FormRenderer = BasicRenderer.extend({
         }).then(function(){
             if (self.lastActivatedFieldIndex >= 0) {
                 self._activateNextFieldWidget(self.state, self.lastActivatedFieldIndex);
-            } 
+            }
         });
     },
     /**
diff --git a/addons/web/static/src/js/views/kanban/kanban_controller.js b/addons/web/static/src/js/views/kanban/kanban_controller.js
index 26846e2c511..ab05fabd517 100644
--- a/addons/web/static/src/js/views/kanban/kanban_controller.js
+++ b/addons/web/static/src/js/views/kanban/kanban_controller.js
@@ -119,7 +119,7 @@ var KanbanController = BasicController.extend({
         return this._super.apply(this, arguments);
     },
     /**
-     * In grouped mode, set 'Create' button as btn-default if there is no column
+     * In grouped mode, set 'Create' button as btn-secondary if there is no column
      * (except if we can't create new columns)
      *
      * @private
diff --git a/addons/web/static/src/js/views/search/search_view_mobile.js b/addons/web/static/src/js/views/search/search_view_mobile.js
index 852a65c0a37..ea7fe33ad81 100644
--- a/addons/web/static/src/js/views/search/search_view_mobile.js
+++ b/addons/web/static/src/js/views/search/search_view_mobile.js
@@ -54,7 +54,7 @@ SearchView.include({
      * @private
      */
     _toggleMobileSearchView: function () {
-        this.$('.o_enable_searchview').toggleClass('btn-default', !!this.query.length);
+        this.$('.o_enable_searchview').toggleClass('btn-secondary', !!this.query.length);
         this.$('.o_mobile_search').toggleClass('o_hidden');
     },
 
diff --git a/addons/web/static/src/js/views/view_dialogs.js b/addons/web/static/src/js/views/view_dialogs.js
index ed0adf0ff3b..e99f81ccb08 100644
--- a/addons/web/static/src/js/views/view_dialogs.js
+++ b/addons/web/static/src/js/views/view_dialogs.js
@@ -109,7 +109,7 @@ var FormViewDialog = ViewDialog.extend({
             options = options || {};
             options.buttons = [{
                 text: (readonly ? _t("Close") : _t("Discard")),
-                classes: "btn-default o_form_button_cancel",
+                classes: "btn-secondary o_form_button_cancel",
                 close: true,
                 click: function () {
                     if (!readonly) {
@@ -360,7 +360,7 @@ var SelectCreateDialog = ViewDialog.extend({
             // Set the dialog's buttons
             self.__buttons = [{
                 text: _t("Cancel"),
-                classes: "btn-default o_form_button_cancel",
+                classes: "btn-secondary o_form_button_cancel",
                 close: true,
             }];
             if (!self.options.no_create) {
diff --git a/addons/web/static/src/js/widgets/dropdown_menu.js b/addons/web/static/src/js/widgets/dropdown_menu.js
index 77dd7be10d0..410d915dc9a 100644
--- a/addons/web/static/src/js/widgets/dropdown_menu.js
+++ b/addons/web/static/src/js/widgets/dropdown_menu.js
@@ -49,7 +49,7 @@ var DropdownMenu = Widget.extend({
         // the style used is the one used in the search view
         this.dropdownStyle = dropdownHeader.style || {
                 el: {class: 'btn-group o_dropdown', attrs: {}},
-                mainButton: {class: 'o_dropdown_toggler_btn btn btn-default dropdown-toggle'},
+                mainButton: {class: 'o_dropdown_toggler_btn btn btn-secondary dropdown-toggle'},
             };
         this.items = items;
         _.each(this.items, this._prepareItem.bind(this));
diff --git a/addons/web/static/src/scss/control_panel.scss b/addons/web/static/src/scss/control_panel.scss
index 54a8eb4ef76..25d4a725604 100644
--- a/addons/web/static/src/scss/control_panel.scss
+++ b/addons/web/static/src/scss/control_panel.scss
@@ -55,7 +55,7 @@
                 }
                 .o_form_binary_form span {
                     padding: 3px 25px;
-                    color: $btn-default-color;
+                    color: $btn-secondary-color;
                 }
                 .o_form_binary_form:hover {
                     background-color: $table-bg-hover;
diff --git a/addons/web/static/src/scss/webclient.scss b/addons/web/static/src/scss/webclient.scss
index 68be626b93a..caea4378aa4 100644
--- a/addons/web/static/src/scss/webclient.scss
+++ b/addons/web/static/src/scss/webclient.scss
@@ -159,7 +159,7 @@ div.o_boolean_toggle {
 .btn-link {
     font-weight: $btn-font-weight;
 
-    &.btn-default {
+    &.btn-secondary {
         @include o-btn-link-variant($text-color, $headings-color);
     }
     &.btn-success, &.text-success {
diff --git a/addons/web/static/src/scss/webclient_extra.scss b/addons/web/static/src/scss/webclient_extra.scss
index cc87e526f8d..12729c149ae 100644
--- a/addons/web/static/src/scss/webclient_extra.scss
+++ b/addons/web/static/src/scss/webclient_extra.scss
@@ -47,5 +47,5 @@ select {
 
 // Button
 .btn-icon {
-    @include button-variant($btn-default-color, $btn-default-bg, $btn-default-border);
+    @include button-variant($btn-secondary-color, $btn-secondary-bg, $btn-secondary-border);
 }
diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index 5e64eb6d0a9..21c8ccc92c3 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -123,7 +123,7 @@
         </div>
         <div class="o_notification_content" t-if="widget.message"><t t-raw="widget.message"/></div>
         <div t-if="widget.buttons.length" class="o_buttons">
-            <button t-foreach="widget.buttons" t-as="button" t-attf-class="btn #{button.primary ? 'btn-primary' : 'btn-default'}" type="button">
+            <button t-foreach="widget.buttons" t-as="button" t-attf-class="btn #{button.primary ? 'btn-primary' : 'btn-secondary'}" type="button">
                 <t t-if="button.icon">
                     <i t-if="button.icon.indexOf('fa-') === 0" t-attf-class="fa fa-fw o_button_icon #{button.icon}" role="img" t-att-aria-label="button.name" t-att-title="button.name"/>
                     <img t-else="" t-att-src="button.icon" t-att-alt="button.name"/>
@@ -176,7 +176,7 @@
         </table>
 
         <button type="button" class="btn btn-primary oe_form_button">Change Password</button>
-        <button type="button" class="btn btn-default oe_form_button oe_form_button_cancel" href="javascript:void(0)">Cancel</button>
+        <button type="button" class="btn btn-secondary oe_form_button oe_form_button_cancel" href="javascript:void(0)">Cancel</button>
     </div>
 </form>
 
@@ -342,7 +342,7 @@
 <t t-name="Sidebar">
     <t t-foreach="widget.sections" t-as="section">
         <div class="btn-group o_dropdown">
-            <button t-if="section.name != 'buttons'" class="o_dropdown_toggler_btn btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
+            <button t-if="section.name != 'buttons'" class="o_dropdown_toggler_btn btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
                 <t t-if="section.name == 'files'" t-raw="widget.items[section.name].length || ''"/>
                 <t t-esc="section.label"/> <span class="caret"/>
             </button>
@@ -400,7 +400,7 @@
         <button type="button" class="btn btn-primary o_list_button_save" accesskey="s">
             Save
         </button>
-        <button type="button" class="btn btn-default o_list_button_discard" accesskey="j">
+        <button type="button" class="btn btn-secondary o_list_button_discard" accesskey="j">
             Discard
         </button>
     </div>
@@ -413,7 +413,7 @@
             Edit
         </button>
         <button t-if="widget.is_action_enabled('create')" type="button"
-                class="btn btn-default o_form_button_create" accesskey="c">
+                class="btn btn-secondary o_form_button_create" accesskey="c">
             Create
         </button>
     </div>
@@ -423,7 +423,7 @@
             Save
         </button>
         <button type="button"
-                class="btn btn-default o_form_button_cancel" accesskey="j">
+                class="btn btn-secondary o_form_button_cancel" accesskey="j">
             Discard
         </button>
     </div>
@@ -522,9 +522,9 @@
         </ul>
     </div>
     <div class="btn-group" role="toolbar" aria-label="Change graph">
-        <button class="btn btn-default fa fa-bar-chart-o o_graph_button" title="Bar Chart" aria-label="Bar Chart" data-mode="bar"/>
-        <button class="btn btn-default fa fa-line-chart o_graph_button" title="Line Chart" aria-label="Line Chart" data-mode="line"/>
-        <button class="btn btn-default fa fa-pie-chart o_graph_button" title="Pie Chart" aria-label="Pie Chart" data-mode="pie"/>
+        <button class="btn btn-secondary fa fa-bar-chart-o o_graph_button" title="Bar Chart" aria-label="Bar Chart" data-mode="bar"/>
+        <button class="btn btn-secondary fa fa-line-chart o_graph_button" title="Line Chart" aria-label="Line Chart" data-mode="line"/>
+        <button class="btn btn-secondary fa fa-pie-chart o_graph_button" title="Pie Chart" aria-label="Pie Chart" data-mode="pie"/>
     </div>
 </t>
 <div t-name="GraphView.error" class="o_view_nocontent" role="alert">
@@ -551,9 +551,9 @@
         </ul>
     </div>
     <div class="btn-group" role="toolbar" aria-label="Pivot settings">
-        <button class="btn btn-default fa fa-expand o_pivot_flip_button" title="Flip axis" aria-label="Flip axis"/>
-        <button class="btn btn-default fa fa-arrows-alt o_pivot_expand_button" title="Expand all" aria-label="Expand all"/>
-        <button class="btn btn-default fa fa-download o_pivot_download" title="Download xls" aria-label="Download xls"/>
+        <button class="btn btn-secondary fa fa-expand o_pivot_flip_button" title="Flip axis" aria-label="Flip axis"/>
+        <button class="btn btn-secondary fa fa-arrows-alt o_pivot_expand_button" title="Expand all" aria-label="Expand all"/>
+        <button class="btn btn-secondary fa fa-download o_pivot_download" title="Download xls" aria-label="Download xls"/>
     </div>
 </t>
 <t t-name="PivotView.FieldSelection">
@@ -613,7 +613,7 @@
     <div t-if="hasModel" class="o_field_domain_panel">
         <i class="fa fa-arrow-right" role="img" aria-label="Domain" title="Domain"/>
 
-        <button t-if="isValid" class="btn btn-xs btn-default o_domain_show_selection_button" type="button">
+        <button t-if="isValid" class="btn btn-xs btn-secondary o_domain_show_selection_button" type="button">
             <t t-esc="nbRecords"/> record(s)
         </button>
         <span t-else="" class="text-warning" role="alert"><i class="fa fa-exclamation-triangle" role="img" aria-label="Warning" title="Warning"/> Invalid domain</span>
@@ -834,7 +834,7 @@
                 t-att-id="widget.idForLabel"/>
             <a role="button" class="o_dropdown_button" draggable="false"/>
         </div>
-        <button type="button" t-if="!widget.nodeOptions.no_open" class="fa fa-external-link btn btn-default o_external_button" tabindex="-1" draggable="false" aria-label="External link" title="External link"/>
+        <button type="button" t-if="!widget.nodeOptions.no_open" class="fa fa-external-link btn btn-secondary o_external_button" tabindex="-1" draggable="false" aria-label="External link" title="External link"/>
     </div>
 </t>
 <t t-name="FieldReference" t-extend="FieldMany2One">
@@ -901,7 +901,7 @@
 </t>
 <t t-name="FieldStatus.content">
     <t t-if="selection_folded.length">
-        <button type="button" class="btn o_arrow_button btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">More <span class="caret"/></button>
+        <button type="button" class="btn o_arrow_button btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">More <span class="caret"/></button>
         <ul class="dropdown-menu o-status-more" role="menu">
             <li t-foreach="selection_folded" t-as="i">
                 <t t-call="FieldStatus.content.button"/>
@@ -919,11 +919,11 @@
         <t t-esc="i.display_name" role="img" t-attf-aria-label="#{i.display_name} is current state"/>
     </button>
     <button type="button" t-att-data-value="i.id" disabled="disabled" title="Not active state" aria-pressed="false"
-        class="btn o_arrow_button btn-default disabled" t-if="!i.selected and disabled">
+        class="btn o_arrow_button btn-secondary disabled" t-if="!i.selected and disabled">
         <t t-esc="i.display_name" role="img" t-attf-aria-label="#{i.display_name} is not current state"/>
     </button>
     <button type="button" t-att-data-value="i.id" title="Not active state, click to change it" aria-pressed="false"
-        class="btn o_arrow_button btn-default" t-if="!i.selected and !disabled">
+        class="btn o_arrow_button btn-secondary" t-if="!i.selected and !disabled">
         <t t-esc="i.display_name" role="img" t-attf-aria-label="Click to change current state to #{i.display_name}"/>
     </button>
 </t>
@@ -971,8 +971,8 @@
             t-att-autofocus="widget.attrs.autofocus"/>
 
         <button type="button" class="btn btn-primary o_select_file_button" title="Select">Upload your file</button>
-        <button type="button" class="btn btn-default fa fa-pencil o_select_file_button" title="Select" aria-label="Select"/>
-        <button type="button" class="btn btn-default fa fa-trash-o o_clear_file_button" title="Clear" aria-label="Clear"/>
+        <button type="button" class="btn btn-secondary fa fa-pencil o_select_file_button" title="Select" aria-label="Select"/>
+        <button type="button" class="btn btn-secondary fa fa-trash-o o_clear_file_button" title="Clear" aria-label="Clear"/>
 
         <span class="o_form_binary_progress">Uploading...</span>
         <t t-call="HiddenInputFile">
@@ -1002,8 +1002,8 @@
         <div t-if="widget.mode !== 'readonly'" class="o_form_pdf_controls mt8" role="toolbar" aria-label="PDF controls">
             <span class="o_form_binary_progress">Uploading...</span>
             <button type="button" class="btn btn-primary o_select_file_button" title="Select">Upload your file</button>
-            <button class="btn btn-default fa fa-pencil o_select_file_button" title="Select" aria-label="Select" type="button"></button>
-            <button class="btn btn-default fa fa-trash-o o_clear_file_button" title="Clear" aria-label="Clear" type="button"></button>
+            <button class="btn btn-secondary fa fa-pencil o_select_file_button" title="Select" aria-label="Select" type="button"></button>
+            <button class="btn btn-secondary fa fa-trash-o o_clear_file_button" title="Clear" aria-label="Clear" type="button"></button>
         </div>
         <iframe class="o_pdfview_iframe o_field_pdfviewer"/>
         <t t-call="HiddenInputPDFFile">
@@ -1024,7 +1024,7 @@
 <div t-name="FieldBinaryFileUploader" t-attf-class="oe_fileupload #{widget.attrs.class ? widget.attrs.class :''}" aria-atomic="true">
     <div class="oe_placeholder_files"/>
     <div t-if="widget.mode !== 'readonly'" class="oe_add">
-        <button class="btn btn-default o_attach" title="Attach"><span class="fa fa-paperclip" aria-label="Attach"/> <t t-esc="widget.string"/></button>
+        <button class="btn btn-secondary o_attach" title="Attach"><span class="fa fa-paperclip" aria-label="Attach"/> <t t-esc="widget.string"/></button>
         <t t-call="HiddenInputFile">
             <t t-set="fileupload_id" t-value="widget.fileupload_id"/>
             <t t-set="fileupload_action" t-translation="off">/web/binary/upload_attachment</t>
@@ -1129,7 +1129,7 @@
     </li>
     <li class="o_add_filter_menu">
         <button class="btn btn-primary o_apply_filter" type="button">Apply</button>
-        <button class="btn btn-default o_add_condition" type="button">
+        <button class="btn btn-secondary o_add_condition" type="button">
             <span class="fa fa-plus-circle"/>
             Add a condition
         </button>
@@ -1276,7 +1276,7 @@
 </t>
 
 <div t-name="SearchView.FavoriteMenu" class="btn-group o_dropdown">
-    <button class="o_dropdown_toggler_btn btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="-1" aria-label="Favorites" title="Favorites">
+    <button class="o_dropdown_toggler_btn btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" tabindex="-1" aria-label="Favorites" title="Favorites">
         <span class="fa fa-star"/> Favorites <span t-attf-class="#{widget.isMobile ? 'fa fa-chevron-right pull-right mt4' : 'caret'}"/>
     </button>
     <ul class="dropdown-menu o_favorites_menu" role="menu">
@@ -1331,11 +1331,11 @@
             <div class="o_left_field_panel"/>
         </div>
         <div class="o_center_panel">
-            <button type="button" class="btn btn-default o_add_field">Add</button>
-            <button type="button" class="btn btn-default o_remove_field">Remove</button>
-            <button type="button" class="btn btn-default o_remove_all_field">Remove All</button>
-            <button type="button" class="btn btn-default o_move_up">Move Up</button>
-            <button type="button" class="btn btn-default o_move_down">Move Down</button>
+            <button type="button" class="btn btn-secondary o_add_field">Add</button>
+            <button type="button" class="btn btn-secondary o_remove_field">Remove</button>
+            <button type="button" class="btn btn-secondary o_remove_all_field">Remove All</button>
+            <button type="button" class="btn btn-secondary o_move_up">Move Up</button>
+            <button type="button" class="btn btn-secondary o_move_down">Move Down</button>
         </div>
         <div class="o_right_panel">
             <h4>
@@ -1363,7 +1363,7 @@
     </t>
 </t>
 <t t-name="Export.SaveList">
-    <label>Save as:</label> <input type="text"/><button type="button" class="btn btn-default">Ok</button>
+    <label>Save as:</label> <input type="text"/><button type="button" class="btn btn-secondary">Ok</button>
 </t>
 <t t-name="Export.SavedList">
     <label>Saved exports: </label>
@@ -1373,7 +1373,7 @@
             <option t-att-value="export.id"><t t-esc="export.name"/></option>
         </t>
     </select>
-    <button type="button" class="btn btn-default o_delete_exported_list">Delete</button>
+    <button type="button" class="btn btn-secondary o_delete_exported_list">Delete</button>
 </t>
 
 <t t-name="Throbber">
@@ -1519,7 +1519,7 @@
 </t>
 
 <t t-name="AttachDocument">
-    <button class="btn btn-default o_attachment_button">
+    <button class="btn btn-secondary o_attachment_button">
         <span class="o_attach_document"><t t-esc="widget.node.attrs.string"/></span>
         <span class="d-none">
             <t t-call="HiddenInputFile">
diff --git a/addons/web/static/src/xml/kanban.xml b/addons/web/static/src/xml/kanban.xml
index 7fd461a7c94..a6d5ecc4ff4 100644
--- a/addons/web/static/src/xml/kanban.xml
+++ b/addons/web/static/src/xml/kanban.xml
@@ -72,7 +72,7 @@
     <div>
         <button class="btn btn-primary o_kanban_add">Add</button>
         <button class="btn btn-primary o_kanban_edit">Edit</button>
-        <button class="btn btn-default o_kanban_cancel ml8">Discard</button>
+        <button class="btn btn-secondary o_kanban_cancel ml8">Discard</button>
     </div>
 </t>
 
diff --git a/addons/web/static/src/xml/report.xml b/addons/web/static/src/xml/report.xml
index 927502e19ac..49313e8de5a 100644
--- a/addons/web/static/src/xml/report.xml
+++ b/addons/web/static/src/xml/report.xml
@@ -11,11 +11,11 @@
             <button type="button" class="btn btn-primary o_report_print" title="Print">Print</button>
         </div>
         <div class="o_edit_mode_available">
-            <button type="button" class="btn btn-default o_report_edit" title="Edit">Edit</button>
+            <button type="button" class="btn btn-secondary o_report_edit" title="Edit">Edit</button>
         </div>
         <div class="o_report_edit_mode">
             <button type="button" class="btn btn-primary o_report_save" title="Save">Save</button>
-            <button type="button" class="btn btn-default o_report_discard" title="Discard">Discard</button>
+            <button type="button" class="btn btn-secondary o_report_discard" title="Discard">Discard</button>
         </div>
     </t>
 </template>
\ No newline at end of file
diff --git a/addons/web/static/src/xml/web_calendar.xml b/addons/web/static/src/xml/web_calendar.xml
index daf378ff3c6..3eb95710c48 100644
--- a/addons/web/static/src/xml/web_calendar.xml
+++ b/addons/web/static/src/xml/web_calendar.xml
@@ -69,9 +69,9 @@
                 <button class="o_calendar_button_next btn btn-primary" aria-label="Next" title="Next"><span class="fa fa-arrow-right"/></button>
             </t>
             <div class="btn-group">
-                <button type="button" class="o_calendar_button_day btn btn-default">Day</button>
-                <button type="button" class="o_calendar_button_week btn btn-default">Week</button>
-                <button type="button" class="o_calendar_button_month btn btn-default">Month</button>
+                <button type="button" class="o_calendar_button_day btn btn-secondary">Day</button>
+                <button type="button" class="o_calendar_button_week btn btn-secondary">Week</button>
+                <button type="button" class="o_calendar_button_month btn btn-secondary">Month</button>
             </div>
         </div>
     </t>
diff --git a/addons/web/static/tests/chrome/action_manager_tests.js b/addons/web/static/tests/chrome/action_manager_tests.js
index 2f003c07577..15ccbb38a7f 100644
--- a/addons/web/static/tests/chrome/action_manager_tests.js
+++ b/addons/web/static/tests/chrome/action_manager_tests.js
@@ -2677,7 +2677,7 @@ QUnit.module('ActionManager', {
             "should display a modal dialog to confirm discard action");
 
         // cancel
-        $('.modal .modal-footer button.btn-default').click();
+        $('.modal .modal-footer button.btn-secondary').click();
 
         assert.strictEqual(actionManager.$('.o_form_view').length, 1,
             "should still be in form view");
diff --git a/addons/web/static/tests/fields/relational_fields_tests.js b/addons/web/static/tests/fields/relational_fields_tests.js
index fd81fba68ab..8c91b0f4d54 100644
--- a/addons/web/static/tests/fields/relational_fields_tests.js
+++ b/addons/web/static/tests/fields/relational_fields_tests.js
@@ -4048,7 +4048,7 @@ QUnit.module('relational_fields', {
             "there should be two records in the one2many in the dialog");
 
         // click on 'Discard'
-        $('.modal-footer .btn-default').click();
+        $('.modal-footer .btn-secondary').click();
 
         assert.strictEqual($('.modal').length, 0, "dialog should be closed");
 
@@ -4800,8 +4800,8 @@ QUnit.module('relational_fields', {
             'delete icon should be visible in edit');
         assert.ok(form.$('.o_field_one2many .o-kanban-button-new').length,
             '"Create" button should be visible in edit');
-        assert.ok(form.$('.o_field_one2many .o-kanban-button-new').hasClass('btn-default'),
-            "'Create' button should have className 'btn-default'");
+        assert.ok(form.$('.o_field_one2many .o-kanban-button-new').hasClass('btn-secondary'),
+            "'Create' button should have className 'btn-secondary'");
         assert.strictEqual(form.$('.o_field_one2many .o-kanban-button-new').text().trim(), "Add",
             'Create button should have "Add" label');
 
@@ -5380,7 +5380,7 @@ QUnit.module('relational_fields', {
             "pager should still display the correct total");
 
         // click on cancel
-        $('.modal .modal-footer .btn-default').click(); // click on cancel
+        $('.modal .modal-footer .btn-secondary').click(); // click on cancel
 
         assert.strictEqual(form.$('.o_cp_pager').text().trim(), '1-3 / 4',
             "pager should again display the correct total");
@@ -5471,7 +5471,7 @@ QUnit.module('relational_fields', {
             'a confirmation model should be opened');
 
         // click on cancel, the line should still be selected
-        $('.modal .modal-footer button.btn-default').click();
+        $('.modal .modal-footer button.btn-secondary').click();
         assert.strictEqual(form.$('tr.o_data_row.o_selected_row').length, 1,
             "should still have 1 selected data row");
 
@@ -11139,9 +11139,9 @@ QUnit.module('relational_fields', {
         var $selectedStatus = form.$('.o_statusbar_status button[data-value="4"]');
         assert.ok($selectedStatus.hasClass('btn-primary') && $selectedStatus.hasClass('disabled'),
             "selected status should be btn-primary and disabled");
-        var $clickable = form.$('.o_statusbar_status button.btn-default:not(.dropdown-toggle):not(:disabled)');
+        var $clickable = form.$('.o_statusbar_status button.btn-secondary:not(.dropdown-toggle):not(:disabled)');
         assert.strictEqual($clickable.length, 2,
-            "other status should be btn-default and not disabled");
+            "other status should be btn-secondary and not disabled");
         $clickable.last().click(); // (last is visually the first here (css))
         var $status = form.$('.o_statusbar_status button[data-value="1"]');
         assert.ok($status.hasClass("btn-primary") && $status.hasClass("disabled"),
diff --git a/addons/web/static/tests/services/notification_service_tests.js b/addons/web/static/tests/services/notification_service_tests.js
index e2619e393f4..aff3de8cc39 100644
--- a/addons/web/static/tests/services/notification_service_tests.js
+++ b/addons/web/static/tests/services/notification_service_tests.js
@@ -184,7 +184,7 @@ QUnit.module('Services', {
         var $notification = $('body .o_notification_manager .o_notification');
         assert.strictEqual($notification.eq(0).find('.o_close').length, 1, "should display the close button in notification");
         assert.strictEqual(_.str.trim($notification.eq(0).html().replace(/\s+/g, ' ')),
-            "<a aria-label=\"Close\" class=\"fa fa-times o_close\" href=\"#\" title=\"Close\"></a> <div class=\"o_notification_title\"> <span role=\"img\" aria-label=\"Notification undefined\" class=\"o_icon fa fa-3x fa-question-circle-o\" title=\"Notification undefined\"></span> a0 </div> <div class=\"o_notification_content\">b0</div> <div class=\"o_buttons\"> <button type=\"button\" class=\"btn btn-primary\"> <span>accept0</span> </button><button type=\"button\" class=\"btn btn-default\"> <span>refuse0</span> </button> </div>",
+            "<a aria-label=\"Close\" class=\"fa fa-times o_close\" href=\"#\" title=\"Close\"></a> <div class=\"o_notification_title\"> <span role=\"img\" aria-label=\"Notification undefined\" class=\"o_icon fa fa-3x fa-question-circle-o\" title=\"Notification undefined\"></span> a0 </div> <div class=\"o_notification_content\">b0</div> <div class=\"o_buttons\"> <button type=\"button\" class=\"btn btn-primary\"> <span>accept0</span> </button><button type=\"button\" class=\"btn btn-secondary\"> <span>refuse0</span> </button> </div>",
             "should display notification");
 
         $notification.find('.o_buttons button:contains(accept0)').click();
diff --git a/addons/web/static/tests/views/calendar_tests.js b/addons/web/static/tests/views/calendar_tests.js
index 9a8d0e9f043..0bdc22bd3ee 100644
--- a/addons/web/static/tests/views/calendar_tests.js
+++ b/addons/web/static/tests/views/calendar_tests.js
@@ -549,7 +549,7 @@ QUnit.module('Views', {
         // delete record
 
         $newevent.trigger('click');
-        $('.modal button.btn-default:contains(Delete)').trigger('click');
+        $('.modal button.btn-secondary:contains(Delete)').trigger('click');
         $('.modal button.btn-primary:contains(Ok)').trigger('click');
         assert.strictEqual(calendar.$('.fc-content').length, 0, "should delete the record");
 
@@ -798,7 +798,7 @@ QUnit.module('Views', {
         // delete record
 
         $newevent.trigger('click');
-        $('.modal button.btn-default:contains(Delete)').trigger('click');
+        $('.modal button.btn-secondary:contains(Delete)').trigger('click');
         $('.modal button.btn-primary:contains(Ok)').trigger('click');
         assert.strictEqual(calendar.$('.fc-content').length, 0, "should delete the record");
 
diff --git a/addons/web/static/tests/views/form_tests.js b/addons/web/static/tests/views/form_tests.js
index 868101833aa..232a6d59f30 100644
--- a/addons/web/static/tests/views/form_tests.js
+++ b/addons/web/static/tests/views/form_tests.js
@@ -1122,7 +1122,7 @@ QUnit.module('Views', {
                         '<button name="0"/>' +
                         '<button name="1" class="btn-primary"/>' +
                         '<button name="2" class="oe_highlight"/>' +
-                        '<button name="3" class="btn-default"/>' +
+                        '<button name="3" class="btn-secondary"/>' +
                         '<button name="4" class="btn-link"/>' +
                         '<button name="5" class="oe_link"/>' +
                         '<button name="6" class="btn-success"/>' +
@@ -1132,7 +1132,7 @@ QUnit.module('Views', {
                         '<button name="8"/>' +
                         '<button name="9" class="btn-primary"/>' +
                         '<button name="10" class="oe_highlight"/>' +
-                        '<button name="11" class="btn-default"/>' +
+                        '<button name="11" class="btn-secondary"/>' +
                         '<button name="12" class="btn-link"/>' +
                         '<button name="13" class="oe_link"/>' +
                         '<button name="14" class="btn-success"/>' +
@@ -1142,13 +1142,13 @@ QUnit.module('Views', {
             res_id: 2,
         });
 
-        assert.strictEqual(form.$('button[name="0"]').attr('class'), 'btn btn-default',
+        assert.strictEqual(form.$('button[name="0"]').attr('class'), 'btn btn-secondary',
             "header buttons without any class should receive the correct classes");
         assert.strictEqual(form.$('button[name="1"]').attr('class'), 'btn btn-primary',
             "header buttons with bootstrap primary class should receive the correct classes");
         assert.strictEqual(form.$('button[name="2"]').attr('class'), 'btn btn-primary',
             "header buttons with oe_highlight class should receive the correct classes");
-        assert.strictEqual(form.$('button[name="3"]').attr('class'), 'btn btn-default',
+        assert.strictEqual(form.$('button[name="3"]').attr('class'), 'btn btn-secondary',
             "header buttons with bootstrap default class should receive the correct classes");
         assert.strictEqual(form.$('button[name="4"]').attr('class'), 'btn btn-link',
             "header buttons with bootstrap link class should receive the correct classes");
@@ -1156,15 +1156,15 @@ QUnit.module('Views', {
             "header buttons with oe_link class should receive the correct classes");
         assert.strictEqual(form.$('button[name="6"]').attr('class'), 'btn btn-success',
             "header buttons with bootstrap state class should receive the correct classes");
-        assert.strictEqual(form.$('button[name="7"]').attr('class'), 'btn o_this_is_a_button btn-default',
+        assert.strictEqual(form.$('button[name="7"]').attr('class'), 'btn o_this_is_a_button btn-secondary',
             "header buttons with custom classes should receive the correct classes");
-        assert.strictEqual(form.$('button[name="8"]').attr('class'), 'btn btn-default',
+        assert.strictEqual(form.$('button[name="8"]').attr('class'), 'btn btn-secondary',
             "sheet header buttons without any class should receive the correct classes");
         assert.strictEqual(form.$('button[name="9"]').attr('class'), 'btn btn-primary',
             "sheet buttons with bootstrap primary class should receive the correct classes");
         assert.strictEqual(form.$('button[name="10"]').attr('class'), 'btn btn-primary',
             "sheet buttons with oe_highlight class should receive the correct classes");
-        assert.strictEqual(form.$('button[name="11"]').attr('class'), 'btn btn-default',
+        assert.strictEqual(form.$('button[name="11"]').attr('class'), 'btn btn-secondary',
             "sheet buttons with bootstrap default class should receive the correct classes");
         assert.strictEqual(form.$('button[name="12"]').attr('class'), 'btn btn-link',
             "sheet buttons with bootstrap link class should receive the correct classes");
@@ -1996,7 +1996,7 @@ QUnit.module('Views', {
             arch: '<form string="Partners">' +
                         '<field name="foo"/>' +
                         '<button string="Do something" class="btn-primary" name="abc" type="object"/>' +
-                        '<button string="Discard" class="btn-default" special="cancel"/>' +
+                        '<button string="Discard" class="btn-secondary" special="cancel"/>' +
                 '</form>',
             res_id: 1,
             mockRPC: function (route, args) {
@@ -2246,7 +2246,7 @@ QUnit.module('Views', {
         // click on discard and cancel the confirm request
         form.$buttons.find('.o_form_button_cancel').click();
         assert.ok($('.modal').length, 'a confirm modal should be displayed');
-        $('.modal-footer .btn-default').click(); // click on cancel
+        $('.modal-footer .btn-secondary').click(); // click on cancel
         assert.strictEqual(form.$('input').val(), 'new value', 'input should still contain new value');
 
         // click on discard and confirm
@@ -2482,7 +2482,7 @@ QUnit.module('Views', {
         // click on the pager to switch to the next record and cancel the confirm request
         form.pager.$('.o_pager_next').click(); // click on next
         assert.ok($('.modal').length, 'a confirm modal should be displayed');
-        $('.modal-footer .btn-default').click(); // click on cancel
+        $('.modal-footer .btn-secondary').click(); // click on cancel
         assert.strictEqual(form.$('input').val(), 'new value', 'input should still contain new value');
         assert.strictEqual(form.pager.$('.o_pager_value').text(), "1", 'pager value should still be 1');
 
@@ -5861,7 +5861,7 @@ QUnit.module('Views', {
         form.$('.o_statusbar_buttons button').click();
         assert.ok(form.$('.o_statusbar_buttons button').prop('disabled'),
             'button should be disabled');
-        $('.modal-footer button.btn-default').click();
+        $('.modal-footer button.btn-secondary').click();
         assert.ok(!form.$('.o_statusbar_buttons button').prop('disabled'),
             'button should no longer be disabled');
 
@@ -6519,7 +6519,7 @@ QUnit.module('Views', {
             }
         });
 
-        form.$('.o_form_statusbar .btn-default').click();
+        form.$('.o_form_statusbar .btn-secondary').click();
         form.destroy();
     });
 
diff --git a/addons/web/static/tests/views/kanban_tests.js b/addons/web/static/tests/views/kanban_tests.js
index bbf02b1eaae..5d18d03c553 100644
--- a/addons/web/static/tests/views/kanban_tests.js
+++ b/addons/web/static/tests/views/kanban_tests.js
@@ -184,7 +184,7 @@ QUnit.module('Views', {
         envIDs = [4];
         kanban.$('.o_kanban_group:last .o_column_archive_records').click(); // Click on 'Archive All'
         assert.ok($('.modal').length, 'a confirm modal should be displayed');
-        $('.modal-footer .btn-default').click(); // Click on 'Cancel'
+        $('.modal-footer .btn-secondary').click(); // Click on 'Cancel'
         assert.strictEqual(kanban.$('.o_kanban_group:last .o_kanban_record').length, 3, "still last column should contain 3 records");
         kanban.$('.o_kanban_group:last .o_column_archive_records').click();
         assert.ok($('.modal').length, 'a confirm modal should be displayed');
@@ -1795,7 +1795,7 @@ QUnit.module('Views', {
         // delete second column (first cancel the confirm request, then confirm)
         kanban.$('.o_kanban_group:last .o_column_delete').click(); // click on delete
         assert.ok($('.modal').length, 'a confirm modal should be displayed');
-        $('.modal-footer .btn-default').click(); // click on cancel
+        $('.modal-footer .btn-secondary').click(); // click on cancel
         assert.strictEqual(kanban.$('.o_kanban_group:last').data('id'), 5,
             'column [5, "xmo"] should still be there');
         kanban.$('.o_kanban_group:last .o_column_delete').click(); // click on delete
@@ -1928,7 +1928,7 @@ QUnit.module('Views', {
         kanban.$('.o_kanban_group[data-id=5] .o_column_edit').click(); // click on 'Edit'
         $('.modal .o_form_editable input').val('ged').trigger('input'); // change the value
         nbRPCs = 0;
-        $('.modal-footer .btn-default').click(); // click on discard
+        $('.modal-footer .btn-secondary').click(); // click on discard
         assert.ok(!$('.modal').length, 'the modal should be closed');
         assert.strictEqual(kanban.$('.o_kanban_group[data-id=5] .o_column_title').text(), 'xmo',
             'title of the column should still be "xmo"');
diff --git a/addons/web/static/tests/views/list_tests.js b/addons/web/static/tests/views/list_tests.js
index 52b7eaed31b..1ea69e9320b 100644
--- a/addons/web/static/tests/views/list_tests.js
+++ b/addons/web/static/tests/views/list_tests.js
@@ -917,7 +917,7 @@ QUnit.module('Views', {
         assert.verifySteps(['/web/dataset/search_read']);
         list.sidebar.$('a:contains(Archive)').click();
         assert.strictEqual($('.modal').length, 1, 'a confirm modal should be displayed');
-        $('.modal-footer .btn-default').click(); // Click on 'Cancel'
+        $('.modal-footer .btn-secondary').click(); // Click on 'Cancel'
         assert.strictEqual(list.$('tbody td.o_list_record_selector').length, 4, "still should have 4 records");
 
         list.sidebar.$('a:contains(Archive)').click();
diff --git a/addons/web/views/webclient_templates.xml b/addons/web/views/webclient_templates.xml
index 5bbb480f735..b05e7e05bf6 100644
--- a/addons/web/views/webclient_templates.xml
+++ b/addons/web/views/webclient_templates.xml
@@ -363,7 +363,7 @@
                     <div class="input-group">
                         <input type="text" name="db" t-att-value="request.db" id="db" class="form-control" required="required" readonly="readonly"/>
                         <span class="input-group-btn">
-                          <a role="button" href="/web/database/selector" class="btn btn-default">Select <i class="fa fa-database" role="img" aria-label="Database" title="Database"></i></a>
+                          <a role="button" href="/web/database/selector" class="btn btn-secondary">Select <i class="fa fa-database" role="img" aria-label="Database" title="Database"></i></a>
                         </span>
                     </div>
                 </div>
diff --git a/addons/web_editor/static/lib/summernote/src/js/Renderer.js b/addons/web_editor/static/lib/summernote/src/js/Renderer.js
index 7fa1afe3adc..4886a76377b 100644
--- a/addons/web_editor/static/lib/summernote/src/js/Renderer.js
+++ b/addons/web_editor/static/lib/summernote/src/js/Renderer.js
@@ -36,7 +36,7 @@ define([
       return (dropdown ? '<div class="btn-group' +
                (className ? ' ' + className : '') + '">' : '') +
                '<button type="button"' +
-                 ' class="btn btn-default btn-sm' +
+                 ' class="btn btn-secondary btn-sm' +
                    ((!dropdown && className) ? ' ' + className : '') +
                    (dropdown ? ' dropdown-toggle' : '') +
                  '"' +
diff --git a/addons/web_editor/static/src/js/editor/rte.summernote.js b/addons/web_editor/static/src/js/editor/rte.summernote.js
index b0669f4b390..cd482a18d7c 100644
--- a/addons/web_editor/static/src/js/editor/rte.summernote.js
+++ b/addons/web_editor/static/src/js/editor/rte.summernote.js
@@ -168,7 +168,7 @@ renderer.tplPopovers = function (lang, options) {
 
     var $alt = $('<div class="btn-group"/>');
     $alt.appendTo($imagePopover.find('.popover-content'));
-    $alt.append('<button class="btn btn-default" data-event="alt"><strong>' + _t('Description') + ': </strong><span class="o_image_alt"/></button>');
+    $alt.append('<button class="btn btn-secondary" data-event="alt"><strong>' + _t('Description') + ': </strong><span class="o_image_alt"/></button>');
 
     //////////////// link popover
 
diff --git a/addons/web_editor/static/src/js/widgets/widgets.js b/addons/web_editor/static/src/js/widgets/widgets.js
index 8148f61a4f8..9e04c9dbe7d 100644
--- a/addons/web_editor/static/src/js/widgets/widgets.js
+++ b/addons/web_editor/static/src/js/widgets/widgets.js
@@ -613,7 +613,7 @@ var ImageWidget = MediaWidget.extend({
         var $input = $(ev.currentTarget);
         var $button = $input.next('button');
         var emptyValue = ($input.val() === '');
-        $button.toggleClass('btn-default', emptyValue).toggleClass('btn-primary', !emptyValue)
+        $button.toggleClass('btn-secondary', emptyValue).toggleClass('btn-primary', !emptyValue)
                .prop('disabled', emptyValue);
     },
     /**
@@ -1477,7 +1477,7 @@ var LinkDialog = Dialog.extend({
         this.data.text = data.label;
         this.data.url = data.url;
         this.data.className = data.classes.replace(/\s+/gi, ' ').replace(/^\s+|\s+$/gi, '');
-        if (data.classes.replace(/(^|[ ])(btn-default|btn-success|btn-primary|btn-info|btn-warning|btn-danger)([ ]|$)/gi, ' ')) {
+        if (data.classes.replace(/(^|[ ])(btn-secondary|btn-success|btn-primary|btn-info|btn-warning|btn-danger)([ ]|$)/gi, ' ')) {
             this.data.style = {'background-color': '', 'color': ''};
         }
         this.data.isNewWindow = data.isNewWindow;
diff --git a/addons/web_editor/static/src/scss/web_editor.ui.scss b/addons/web_editor/static/src/scss/web_editor.ui.scss
index 585f134afb7..e82ad579fe8 100644
--- a/addons/web_editor/static/src/scss/web_editor.ui.scss
+++ b/addons/web_editor/static/src/scss/web_editor.ui.scss
@@ -61,7 +61,7 @@
             &.btn-primary {
                 @include button-variant(white, $o-brand-primary, $o-brand-primary);
             }
-            &.btn-default {
+            &.btn-secondary {
                 @include button-variant(white, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0));
 
                 &:hover {
diff --git a/addons/web_editor/static/src/scss/web_editor.variables.scss b/addons/web_editor/static/src/scss/web_editor.variables.scss
index 196af3ff0ad..0e65ea99afa 100644
--- a/addons/web_editor/static/src/scss/web_editor.variables.scss
+++ b/addons/web_editor/static/src/scss/web_editor.variables.scss
@@ -177,7 +177,7 @@ $o-we-switch-inactive-color: $o-we-color-paper !default;
         &.btn-primary {
             @include button-variant(white, $o-brand-optional, darken($o-brand-optional,5%));
         }
-        &.btn-default {
+        &.btn-secondary {
             @include button-variant($o-we-color-normal, white, $o-we-color-text-light);
         }
         &.btn-link {
diff --git a/addons/web_editor/static/src/xml/ace.xml b/addons/web_editor/static/src/xml/ace.xml
index 4380a73ae54..257ce6af707 100644
--- a/addons/web_editor/static/src/xml/ace.xml
+++ b/addons/web_editor/static/src/xml/ace.xml
@@ -27,7 +27,7 @@
             </label>
             <div class="o_button_section">
                 <button data-action="save" type="submit" class="btn btn-primary">Save</button>
-                <button data-action="close" type="button" class="btn btn-default">Close</button>
+                <button data-action="close" type="button" class="btn btn-secondary">Close</button>
             </div>
         </div>
         <div id="ace-view-id">
diff --git a/addons/web_editor/static/src/xml/backend.xml b/addons/web_editor/static/src/xml/backend.xml
index 76663cc9fbc..c4666a1aa96 100644
--- a/addons/web_editor/static/src/xml/backend.xml
+++ b/addons/web_editor/static/src/xml/backend.xml
@@ -9,7 +9,7 @@
 
     <t t-name="web_editor.FieldTextHtml.button.translate">
         <div class="btn-group pull-right">
-            <button t-if="widget.field.translate" class="o_field_translate btn btn-default" style="height: 24px; padding: 1px 17px 0px 5px" aria-label="Translate" title="Translate">
+            <button t-if="widget.field.translate" class="o_field_translate btn btn-secondary" style="height: 24px; padding: 1px 17px 0px 5px" aria-label="Translate" title="Translate">
                 <span class="fa fa-language fa-lg oe_input_icon"/>
             </button>
         </div>
diff --git a/addons/web_editor/static/src/xml/editor.xml b/addons/web_editor/static/src/xml/editor.xml
index 01a4af11ac4..1928572fc0d 100644
--- a/addons/web_editor/static/src/xml/editor.xml
+++ b/addons/web_editor/static/src/xml/editor.xml
@@ -9,7 +9,7 @@
         <div id="web_editor-top-edit">
             <div id="web_editor-toolbars"/>
             <form class="navbar-form text-muted">
-                <button type="button" class="btn btn-default" data-action="cancel"><i class="fa fa-times"/> Discard</button>
+                <button type="button" class="btn btn-secondary" data-action="cancel"><i class="fa fa-times"/> Discard</button>
                 <button type="button" class="btn btn-primary" data-action="save"><i class="fa fa-floppy-o"/> Save</button>
             </form>
         </div>
@@ -54,10 +54,10 @@
             <li class="search pull-right">
                 <ul class="pager mb0 mt0">
                     <li class="previous">
-                        <a role="button" class="btn btn-default disabled" href="#"><i class="fa fa-angle-left"/>&#32;Previous</a>
+                        <a role="button" class="btn btn-secondary disabled" href="#"><i class="fa fa-angle-left"/>&#32;Previous</a>
                     </li>
                     <li class="next">
-                        <a role="button" class="btn btn-default disabled" href="#">Next&#32;<i class="fa fa-angle-right"/></a>
+                        <a role="button" class="btn btn-secondary disabled" href="#">Next&#32;<i class="fa fa-angle-right"/></a>
                     </li>
                 </ul>
             </li>
@@ -110,7 +110,7 @@
                     <label for="imageurl">Add an image URL</label>
                     <div class="form-group btn-group">
                         <input type="text" class="form-control url pull-left" id="imageurl" name="url" placeholder="https://www.odoo.com/logo.png" style="width: 250px;"/>
-                        <button type="button" class="btn btn-default o_upload_image_url_button" disabled="disabled">Add</button>
+                        <button type="button" class="btn btn-secondary o_upload_image_url_button" disabled="disabled">Add</button>
                     </div>
                 </div>
             </div>
@@ -271,7 +271,7 @@
                                 <input class="d-none link-style" name="link_style_color" type="radio" value=""/>
                                 <i class="fa"/>
                             </label>
-                            <t t-foreach="['primary', 'default', 'success', 'info', 'warning', 'danger', 'alpha', 'beta', 'gamma', 'delta', 'epsilon']" t-as="color">
+                            <t t-foreach="['primary', 'secondary', 'success', 'info', 'warning', 'danger', 'alpha', 'beta', 'gamma', 'delta', 'epsilon']" t-as="color">
                                 <label role="button" t-attf-class="o_link_dialog_color_item o_btn_preview btn btn-#{color}" t-attf-aria-label="Color for #{color}" t-attf-title="Color for #{color}">
                                     <input type="radio" name="link_style_color" class="d-none link-style" t-att-value="color"/>
                                     <i class="fa"/>
@@ -319,25 +319,25 @@
                <div class="btn-group" title="Aspect Ratio" data-toggle="buttons">
                    <t t-foreach="widget.aspectRatioList" t-as="ratio">
                        <t t-set="is_active" t-value="ratio[1] === widget.imageData.aspectRatio"/>
-                       <a href="#" t-attf-class="btn btn-default#{is_active and ' active' or ''}" data-event="ratio" t-att-data-label="ratio[1]" t-att-data-value="ratio[2]">
+                       <a href="#" t-attf-class="btn btn-secondary#{is_active and ' active' or ''}" data-event="ratio" t-att-data-label="ratio[1]" t-att-data-value="ratio[2]">
                             <t t-esc="ratio[0]"/>
                        </a>
                    </t>
                </div>
                <div class="btn-group" role="group">
-                   <a href="#" class="btn btn-default" title="Zoom In" data-event="zoom" data-value="0.1"><i class="fa fa-search-plus"/></a>
-                   <a href="#" class="btn btn-default" title="Zoom Out" data-event="zoom" data-value="-0.1"><i class="fa fa-search-minus"/></a>
+                   <a href="#" class="btn btn-secondary" title="Zoom In" data-event="zoom" data-value="0.1"><i class="fa fa-search-plus"/></a>
+                   <a href="#" class="btn btn-secondary" title="Zoom Out" data-event="zoom" data-value="-0.1"><i class="fa fa-search-minus"/></a>
                </div>
                <div class="btn-group" role="group">
-                   <a href="#" class="btn btn-default" title="Rotate Left" data-event="rotate" data-value="-45"><i class="fa fa-rotate-left"/></a>
-                   <a href="#" class="btn btn-default" title="Rotate Right" data-event="rotate" data-value="45"><i class="fa fa-rotate-right"/></a>
+                   <a href="#" class="btn btn-secondary" title="Rotate Left" data-event="rotate" data-value="-45"><i class="fa fa-rotate-left"/></a>
+                   <a href="#" class="btn btn-secondary" title="Rotate Right" data-event="rotate" data-value="45"><i class="fa fa-rotate-right"/></a>
                </div>
                <div class="btn-group" role="group">
-                   <a href="#" class="btn btn-default" title="Flip Horizontal" data-event="flip" data-value="horizontal" data-x="1"><i class="fa fa-arrows-h"/></a>
-                   <a href="#" class="btn btn-default" title="Flip Vertical" data-event="flip" data-value="vertical" data-y="1"><i class="fa fa-arrows-v"/></a>
+                   <a href="#" class="btn btn-secondary" title="Flip Horizontal" data-event="flip" data-value="horizontal" data-x="1"><i class="fa fa-arrows-h"/></a>
+                   <a href="#" class="btn btn-secondary" title="Flip Vertical" data-event="flip" data-value="vertical" data-y="1"><i class="fa fa-arrows-v"/></a>
                </div>
                <div class="btn-group" role="group">
-                   <a href="#" class="btn btn-default" title="Reset Image" data-event="reset"><i class="fa fa-refresh"/> Reset Image</a>
+                   <a href="#" class="btn btn-secondary" title="Reset Image" data-event="reset"><i class="fa fa-refresh"/> Reset Image</a>
                </div>
            </div>
        </t>
diff --git a/addons/web_editor/static/src/xml/snippets.xml b/addons/web_editor/static/src/xml/snippets.xml
index 3c368ebaaf2..586b920edf0 100644
--- a/addons/web_editor/static/src/xml/snippets.xml
+++ b/addons/web_editor/static/src/xml/snippets.xml
@@ -10,14 +10,14 @@
             </div>
             <div class="oe_overlay_options" contentEditable="false">
                 <div class="btn-group">
-                    <a role="button" href="#" class="btn btn-default oe_snippet_parent" title="Select Parent Container" aria-label="Select Parent Container"><i class="fa fa-lg fa-level-up"/></a>
+                    <a role="button" href="#" class="btn btn-secondary oe_snippet_parent" title="Select Parent Container" aria-label="Select Parent Container"><i class="fa fa-lg fa-level-up"/></a>
                     <div class="dropdown oe_options d-none btn-group">
                         <a role="button" href="#" data-toggle="dropdown" class="btn btn-primary" title="Customize">Customize</a>
                         <ul class="dropdown-menu" role="menu"/>
                     </div>
-                    <a role="button" href="#" class="btn btn-default oe_snippet_move" title="Drag to Move" aria-label="Drag to Move"><i class="fa fa-arrows ml4 mr4"></i></a>
-                    <a role="button" href="#" class="btn btn-default oe_snippet_clone" title="Duplicate Container" aria-label="Duplicate Container"><i class="fa fa-files-o ml4 mr4"></i></a>
-                    <a role="button" href="#" class="btn btn-default oe_snippet_remove" title="Remove Block" aria-label="Remove Block"><i class="fa fa-trash-o ml4 mr4"></i></a>
+                    <a role="button" href="#" class="btn btn-secondary oe_snippet_move" title="Drag to Move" aria-label="Drag to Move"><i class="fa fa-arrows ml4 mr4"></i></a>
+                    <a role="button" href="#" class="btn btn-secondary oe_snippet_clone" title="Duplicate Container" aria-label="Duplicate Container"><i class="fa fa-files-o ml4 mr4"></i></a>
+                    <a role="button" href="#" class="btn btn-secondary oe_snippet_remove" title="Remove Block" aria-label="Remove Block"><i class="fa fa-trash-o ml4 mr4"></i></a>
                 </div>
             </div>
         </div>
@@ -40,7 +40,7 @@
     <!-- t-field options -->
     <t t-name="web_editor.many2one.button">
         <div class="btn-group">
-            <a role="button" href="#" class="btn btn-default dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" title="Search Contact" aria-label="Search Contact"><i class="fa fa-search"></i></a>
+            <a role="button" href="#" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" title="Search Contact" aria-label="Search Contact"><i class="fa fa-search"></i></a>
             <ul class="dropdown-menu contact_menu" role="menu">
                 <li><a role="menuitem"><input href="#" type="email" placeholder="Search"/></a></li>
             </ul>
diff --git a/addons/website/static/src/js/tours/rte.js b/addons/website/static/src/js/tours/rte.js
index 7ce549a0346..46fbbff3fce 100644
--- a/addons/website/static/src/js/tours/rte.js
+++ b/addons/website/static/src/js/tours/rte.js
@@ -72,7 +72,7 @@ tour.register('rte_translator', {
     trigger: 'html:not(:has(#wrap p span)) .o_menu_systray a[data-action="translate"]',
 }, {
     content: "close modal",
-    trigger: '.modal-footer .btn-default',
+    trigger: '.modal-footer .btn-secondary',
 }, {
     content: "check if translation is activate",
     trigger: '[data-oe-translation-id]',
diff --git a/addons/website/static/src/xml/website.backend.xml b/addons/website/static/src/xml/website.backend.xml
index 1bf996f7cef..e5a07ad6139 100644
--- a/addons/website/static/src/xml/website.backend.xml
+++ b/addons/website/static/src/xml/website.backend.xml
@@ -63,9 +63,9 @@
     <t t-name="website.DateRangeButtons">
         <!-- TODO: Hide in mobile as it is going to push in control panel and it breaks UI, maybe we will improve it in future -->
         <div class="btn-group o_date_range_buttons d-none d-md-inline-flex pull-right">
-            <button class="btn btn-default js_date_range active" data-date="week">Last Week</button>
-            <button class="btn btn-default js_date_range" data-date="month">Last Month</button>
-            <button class="btn btn-default js_date_range" data-date="year">Last Year</button>
+            <button class="btn btn-secondary js_date_range active" data-date="week">Last Week</button>
+            <button class="btn btn-secondary js_date_range" data-date="month">Last Month</button>
+            <button class="btn btn-secondary js_date_range" data-date="year">Last Year</button>
         </div>
     </t>
 
diff --git a/addons/website/static/src/xml/website.xml b/addons/website/static/src/xml/website.xml
index 7bded7ce4e6..300badf2511 100644
--- a/addons/website/static/src/xml/website.xml
+++ b/addons/website/static/src/xml/website.xml
@@ -24,7 +24,7 @@
                     </main>
                     <footer class="modal-footer">
                         <button type="button" class="btn btn-primary btn-continue">Continue</button>
-                        <button type="button" class="btn btn-default" data-dismiss="modal" aria-label="Cancel">Cancel</button>
+                        <button type="button" class="btn btn-secondary" data-dismiss="modal" aria-label="Cancel">Cancel</button>
                     </footer>
                 </div>
             </div>
diff --git a/addons/website/views/website_templates.xml b/addons/website/views/website_templates.xml
index 421157ea2b4..37f85a2e161 100644
--- a/addons/website/views/website_templates.xml
+++ b/addons/website/views/website_templates.xml
@@ -310,7 +310,7 @@
     <ul class="js_language_selector mb0 list-inline" t-if="(request and request.is_frontend_multilang and len(languages) &gt; 1) or (website and (editable or translatable))">
         <li>
             <div class="dropup">
-                <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
+                <button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
                     <span t-esc="list(filter(lambda lg : lg[0] == lang, languages))[0][1].split('/').pop()"/>
                     <span class="caret ml4"/>
                 </button>
@@ -341,7 +341,7 @@
         <div t-attf-class="btn-group #{btn_class} js_publish_management #{object.website_published and 'css_published' or 'css_unpublished'}" t-att-data-id="object.id" t-att-data-object="object._name" t-att-data-controller="publish_controller">
             <button class="btn btn-danger js_publish_btn">Unpublished</button>
             <button class="btn btn-success js_publish_btn">Published</button>
-            <button type="button" t-attf-class="btn btn-default dropdown-toggle" t-att-id="'dopprod-%s' % object.id" data-toggle="dropdown">
+            <button type="button" t-attf-class="btn btn-secondary dropdown-toggle" t-att-id="'dopprod-%s' % object.id" data-toggle="dropdown">
                 <span class="caret"></span>
             </button>
             <ul class="dropdown-menu" role="menu" t-att-aria-labelledby="'dopprod-%s' % object.id">
@@ -857,7 +857,7 @@ Sitemap: <t t-esc="url_root"/>sitemap.xml
             <input type="text" name="search" class="search-query form-control oe_search_box" placeholder="Search..." t-att-value="search" />
         </div>
         <span class="input-group-btn">
-           <button type="submit" class="btn btn-default oe_search_button" aria-label="Search" title="Search"><i class="fa fa-search"/></button>
+           <button type="submit" class="btn btn-secondary oe_search_button" aria-label="Search" title="Search"><i class="fa fa-search"/></button>
         </span>
     </div>
 </template>
@@ -879,7 +879,7 @@ Sitemap: <t t-esc="url_root"/>sitemap.xml
               <t t-call="website.website_search_box"/>
           </form>
           <div t-if="searchbar_sortings" class="dropdown pull-right mt8 mr8">
-              <button class="btn btn-default" type="button" data-toggle="dropdown">
+              <button class="btn btn-secondary" type="button" data-toggle="dropdown">
                   <span class="fa fa-sort fa-lg" role="img" aria-label="Sort" title="Sort"/>
                   <span class="d-none d-xl-inline" t-esc="searchbar_sortings[sortby].get('label', 'Newest')"/>
                   <span class="caret" role="img" aria-label="Dropdown menu" title="Dropdown menu"></span>
diff --git a/addons/website_crm_partner_assign/views/website_crm_partner_assign_templates.xml b/addons/website_crm_partner_assign/views/website_crm_partner_assign_templates.xml
index c0645d9ebe9..a4b1fd48dd0 100644
--- a/addons/website_crm_partner_assign/views/website_crm_partner_assign_templates.xml
+++ b/addons/website_crm_partner_assign/views/website_crm_partner_assign_templates.xml
@@ -263,7 +263,7 @@
         <t t-call="portal.portal_layout">
             <t t-call="portal.portal_searchbar">
                 <t t-set="title">My Opportunities</t>
-                <li class="pull-left"><button t-if="request.env.user.partner_id.grade_id or request.env.user.commercial_partner_id.grade_id" name='new_opp' data-toggle="modal" data-target=".modal_new_opp" class="btn btn-default navbar-btn ml16" title="Add an opportunity" aria-label="Add an opportunity"><i class="fa fa-plus"/></button></li>
+                <li class="pull-left"><button t-if="request.env.user.partner_id.grade_id or request.env.user.commercial_partner_id.grade_id" name='new_opp' data-toggle="modal" data-target=".modal_new_opp" class="btn btn-secondary navbar-btn ml16" title="Add an opportunity" aria-label="Add an opportunity"><i class="fa fa-plus"/></button></li>
             </t>
             <div class="modal fade modal_new_opp" role="form">
                 <div class="modal-dialog">
@@ -447,7 +447,7 @@
                             </main>
                             <footer class="modal-footer">
                                 <button t-attf-class="btn btn-primary interested_partner_assign_confirm">Confirm</button>
-                                <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                                <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                             </footer>
                         </form>
                     </div>
@@ -480,7 +480,7 @@
                             </main>
                             <footer class="modal-footer">
                                 <button t-attf-class="btn btn-primary desinterested_partner_assign_confirm">Confirm</button>
-                                <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                                <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                             </footer>
                         </form>
                     </div>
@@ -510,7 +510,7 @@
                             </h4>
                             <span class="btn-group pull-right" role="group">
                                 <t t-foreach="stages" t-as="stage">
-                                    <button type="button" t-att-data="stage.id" t-att-opp="opportunity.id" t-attf-class="pull-right btn opp-stage-button #{'btn-default' if opportunity.stage_id.name != stage.name else 'disabled btn-primary'}">
+                                    <button type="button" t-att-data="stage.id" t-att-opp="opportunity.id" t-attf-class="pull-right btn opp-stage-button #{'btn-secondary' if opportunity.stage_id.name != stage.name else 'disabled btn-primary'}">
                                         <span t-field="stage.name"/>
                                     </button>
                                 </t>
@@ -611,7 +611,7 @@
                                         </main>
                                         <footer class="modal-footer">
                                             <button t-attf-class="btn btn-primary edit_contact_confirm">Confirm</button>
-                                            <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                                            <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                                         </footer>
                                     </form>
                                 </div>
@@ -731,7 +731,7 @@
                                         </main>
                                         <footer class="modal-footer">
                                             <button t-attf-class="btn btn-primary edit_opp_confirm">Confirm</button>
-                                            <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                                            <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                                         </footer>
                                     </form>
                                 </div>
diff --git a/addons/website_crm_partner_assign/wizard/crm_forward_to_partner_view.xml b/addons/website_crm_partner_assign/wizard/crm_forward_to_partner_view.xml
index 7adc57ec617..39b88bc65cb 100644
--- a/addons/website_crm_partner_assign/wizard/crm_forward_to_partner_view.xml
+++ b/addons/website_crm_partner_assign/wizard/crm_forward_to_partner_view.xml
@@ -30,7 +30,7 @@
                     </notebook>
                     <footer>
                         <button name="action_forward" string="Send" type="object" class="btn-primary"/>
-                        <button string="Cancel" special="cancel" class="btn-default"/>
+                        <button string="Cancel" special="cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
diff --git a/addons/website_event/views/event_templates.xml b/addons/website_event/views/event_templates.xml
index 2cca45546d1..462942423c2 100644
--- a/addons/website_event/views/event_templates.xml
+++ b/addons/website_event/views/event_templates.xml
@@ -566,7 +566,7 @@
                     <footer class="modal-footer">
                         <div class="pull-left">
                             <button type="submit" class="btn btn-primary">Continue</button>
-                            <button type="button" class="btn btn-default js_goto_event" data-dismiss="modal">Cancel Registration</button>
+                            <button type="button" class="btn btn-secondary js_goto_event" data-dismiss="modal">Cancel Registration</button>
                         </div>
                     </footer>
                 </div>
diff --git a/addons/website_forum/views/website_forum.xml b/addons/website_forum/views/website_forum.xml
index f2e5f2934c5..a2a109ea9f4 100644
--- a/addons/website_forum/views/website_forum.xml
+++ b/addons/website_forum/views/website_forum.xml
@@ -87,7 +87,7 @@
                             <form class="navbar-form" role="search" t-attf-action="/forum/#{ slug(forum) }" method="get">
                                 <t t-call="website.website_search_box"/>
                                 <span class="dropdown" groups="base.group_erp_manager">
-                                    <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
+                                    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
                                         <i class="fa fa-cog" role="img" aria-label="Dropdown menu" title="Dropdown menu"/>
                                     </button>
                                     <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
diff --git a/addons/website_forum_doc/views/website_doc.xml b/addons/website_forum_doc/views/website_doc.xml
index 6c01faf2295..590975fa063 100644
--- a/addons/website_forum_doc/views/website_doc.xml
+++ b/addons/website_forum_doc/views/website_doc.xml
@@ -64,7 +64,7 @@
                                     <input type="search" class="form-control"
                                         name="search" placeholder="Search..."
                                         t-att-value="search or None"/>
-                                    <button type="submit" class="btn btn-default">Search</button>
+                                    <button type="submit" class="btn btn-secondary">Search</button>
                                 </div>
                             </form>
                         </div>
@@ -103,7 +103,7 @@
                                     <input type="search" class="form-control"
                                         name="search" placeholder="Search..."
                                         t-att-value="search or None"/>
-                                    <button type="submit" class="btn btn-default">Search</button>
+                                    <button type="submit" class="btn btn-secondary">Search</button>
                                 </div>
                             </form>
                         </div>
diff --git a/addons/website_gengo/static/src/xml/website.gengo.xml b/addons/website_gengo/static/src/xml/website.gengo.xml
index 2265ad7a70c..a7ae579d116 100644
--- a/addons/website_gengo/static/src/xml/website.gengo.xml
+++ b/addons/website_gengo/static/src/xml/website.gengo.xml
@@ -45,7 +45,7 @@
                     </div>
                     <div>
                         <button type="button" data-action="activate" class="btn btn-primary">Ok</button>
-                        <button type="button" class="btn btn-default" data-action="discard" data-dismiss="modal">Cancel</button>
+                        <button type="button" class="btn btn-secondary" data-action="discard" data-dismiss="modal">Cancel</button>
                     </div>
                 </footer>
             </div>
@@ -73,7 +73,7 @@
                 </main>
                 <footer class="modal-footer">
                     <button type="button" data-action="service_level" class="btn btn-primary">Post</button>
-                    <button type="button" class="btn btn-default" data-action="discard" data-dismiss="modal">Cancel</button>
+                    <button type="button" class="btn btn-secondary" data-action="discard" data-dismiss="modal">Cancel</button>
                 </footer>
             </div>
         </div>
@@ -150,7 +150,7 @@
                 </main>
                 <footer class="modal-footer">
                     <button type="button" data-action="set_config" class="btn btn-primary">Submit</button>
-                    <button type="button" class="btn btn-default" data-action="discard" data-dismiss="modal">Close</button>
+                    <button type="button" class="btn btn-secondary" data-action="discard" data-dismiss="modal">Close</button>
                 </footer>
             </div>
         </div>
diff --git a/addons/website_mail/views/website_mail_templates.xml b/addons/website_mail/views/website_mail_templates.xml
index 253851a504b..ddc881e012c 100644
--- a/addons/website_mail/views/website_mail_templates.xml
+++ b/addons/website_mail/views/website_mail_templates.xml
@@ -11,7 +11,7 @@
                   placeholder="your email..."
                   groups="base.group_public"/>
             <span class="input-group-btn">
-                <button href="#" t-attf-class="btn btn-default js_unfollow_btn">Unsubscribe</button>
+                <button href="#" t-attf-class="btn btn-secondary js_unfollow_btn">Unsubscribe</button>
                 <button href="#" t-attf-class="btn btn-primary js_follow_btn">Subscribe</button>
             </span>
         </div>
diff --git a/addons/website_quote/views/website_quote_templates.xml b/addons/website_quote/views/website_quote_templates.xml
index 4441006d6a8..3f423e6761d 100644
--- a/addons/website_quote/views/website_quote_templates.xml
+++ b/addons/website_quote/views/website_quote_templates.xml
@@ -421,7 +421,7 @@
                             </main>
                             <footer class="modal-footer">
                                 <button type="submit" t-att-id="quotation.id" class="btn btn-primary">Reject</button>
-                                <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                                <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                             </footer>
                           </form>
                         </div>
diff --git a/addons/website_sale/static/src/js/website_sale_tour_shop.js b/addons/website_sale/static/src/js/website_sale_tour_shop.js
index 1f333bf2cff..72beb5999d8 100644
--- a/addons/website_sale/static/src/js/website_sale_tour_shop.js
+++ b/addons/website_sale/static/src/js/website_sale_tour_shop.js
@@ -45,7 +45,7 @@ odoo.define("website_sale.tour_shop", function (require) {
         content: _t("Upload an image from your local library."),
         position: "bottom",
         run: function (actions) {
-            actions.auto(".modal-footer .btn-default");
+            actions.auto(".modal-footer .btn-secondary");
         },
     }, {
         trigger: "#snippet_structure .oe_snippet:eq(8) .oe_snippet_thumbnail",
diff --git a/addons/website_sale/views/product_views.xml b/addons/website_sale/views/product_views.xml
index 6ca1f76d7e9..71bba73da01 100644
--- a/addons/website_sale/views/product_views.xml
+++ b/addons/website_sale/views/product_views.xml
@@ -118,7 +118,7 @@
                                             <span t-attf-class="o_website_sale_image_card_size label label-#{size_status}" t-att-title="message">
                                                 <t t-esc="record.image.value"/>
                                             </span>
-                                            <a role="button" t-if="!read_only_mode" type="delete" class="btn btn-xs btn-default o_website_sale_image_card_remove" aria-label="Remove" title="Remove"><i class="fa fa-trash"/></a>
+                                            <a role="button" t-if="!read_only_mode" type="delete" class="btn btn-xs btn-secondary o_website_sale_image_card_remove" aria-label="Remove" title="Remove"><i class="fa fa-trash"/></a>
                                         </div>
                                     </div>
                                 </t>
diff --git a/addons/website_sale/views/templates.xml b/addons/website_sale/views/templates.xml
index 4fae02ef552..d3e703af08d 100644
--- a/addons/website_sale/views/templates.xml
+++ b/addons/website_sale/views/templates.xml
@@ -111,7 +111,7 @@
                         <strong>
                             <a itemprop="name" t-att-href="product_href" t-att-content="product.name" t-field="product.name" />
                         </strong>
-                        <a role="button" t-if="not show_publish and not product.website_published" t-att-href="product_href" class="btn btn-default btn-xs btn-danger" title="This product is unpublished.">Unpublished</a>
+                        <a role="button" t-if="not show_publish and not product.website_published" t-att-href="product_href" class="btn btn-secondary btn-xs btn-danger" title="This product is unpublished.">Unpublished</a>
                     </h5>
                     <div itemprop="offers" itemscope="itemscope" itemtype="http://schema.org/Offer" class="product_price" t-if="product.product_variant_ids">
                         <b>
@@ -141,12 +141,12 @@
         <xpath expr="//div[hasclass('product_price')]" position="inside">
             <input name="product_id" t-att-value="product.product_variant_id.id" type="hidden" />
             <t t-if="len(product.product_variant_ids) == 1">
-                <a role="button" class="btn btn-default btn-xs a-submit" aria-label="Shopping cart" title="Shopping cart">
+                <a role="button" class="btn btn-secondary btn-xs a-submit" aria-label="Shopping cart" title="Shopping cart">
                     <span class="fa fa-shopping-cart" />
                 </a>
             </t>
             <t t-if="len(product.product_variant_ids) &gt; 1">
-                <a role="button" class="btn btn-default btn-xs" t-att-href="keep('/shop/product/%s' % slug(product), page=(pager['page']['num'] if pager['page']['num']&gt;1 else None))" aria-label="Shopping cart" title="Shopping cart">
+                <a role="button" class="btn btn-secondary btn-xs" t-att-href="keep('/shop/product/%s' % slug(product), page=(pager['page']['num'] if pager['page']['num']&gt;1 else None))" aria-label="Shopping cart" title="Shopping cart">
                     <span class="fa fa-shopping-cart" />
                 </a>
             </t>
@@ -157,7 +157,7 @@
         <t t-set="website_sale_pricelists" t-value="website.get_pricelist_available(show_visible=True)" />
         <div t-attf-class="#{website_sale_pricelists and len(website_sale_pricelists)&gt;1 and 'dropdown' or 'd-none'} btn-group">
             <t t-set="curr_pl" t-value="website.get_current_pricelist()" />
-            <a role="button" href="#" class="dropdown-toggle btn btn-default" data-toggle="dropdown">
+            <a role="button" href="#" class="dropdown-toggle btn btn-secondary" data-toggle="dropdown">
                 <t t-esc="curr_pl and curr_pl.name or ' - '" />
                 <span class="caret"></span>
             </a>
@@ -247,7 +247,7 @@
             ]"/>
             <t t-set="website_sale_sortable_current" t-value="[sort for sort in website_sale_sortable if sort[1]==request.params.get('order', '')]"/>
             <div class="dropdown btn-group dropdown_sorty_by">
-                <a role="button" href="#" class="dropdown-toggle btn btn-default" data-toggle="dropdown">
+                <a role="button" href="#" class="dropdown-toggle btn btn-secondary" data-toggle="dropdown">
                     <t t-if='len(website_sale_sortable_current)'>
                         <span>Sorting by : <t t-raw='website_sale_sortable_current[0][0]'/></span>
                     </t>
@@ -778,7 +778,7 @@
                                             <div class="col-md-3 col-sm-4">
                                             </div>
                                             <div class="col-md-9 col-sm-8">
-                                                <a role="button" href="/shop/checkout" class="btn btn-default mb32 pull-left"><span class="fa fa-chevron-left" /> Previous</a>
+                                                <a role="button" href="/shop/checkout" class="btn btn-secondary mb32 pull-left"><span class="fa fa-chevron-left" /> Previous</a>
                                                 <a role="button" class="btn btn-primary pull-right mb32 o_website_form_send" href="/shop/confirm_order">Next <span class="fa fa-chevron-right" /></a>
                                             </div>
                                         </div>
@@ -899,7 +899,7 @@
                                     </div>
                                     <t t-call="website_sale.cart_lines" />
                                     <div class="clearfix" />
-                                    <a role="button" href="/shop" class="btn btn-default mb32 d-none d-xl-inline-block">
+                                    <a role="button" href="/shop" class="btn btn-secondary mb32 d-none d-xl-inline-block">
                                         <span class="fa fa-chevron-left" />
                                         <span class="">Continue Shopping</span>
                                     </a>
@@ -914,7 +914,7 @@
                         <div class="col-lg-4 col-sm-12 col-xs-12">
                             <t t-call='website_sale.short_cart_summary'/>
                             <div class="d-xl-none">
-                                <a role="button" href="/shop" class="btn btn-default mb32">
+                                <a role="button" href="/shop" class="btn btn-secondary mb32">
                                     <span class="fa fa-chevron-left" />
                                     Continue<span class="d-none d-md-inline"> Shopping</span>
                                 </a>
@@ -1010,7 +1010,7 @@
             <div class="input-group" style='margin-left:auto; margin-right: auto'>
                 <input name="promo" style='min-width:180px' class="form-control" type="text" placeholder="code..." t-att-value="website_sale_order.pricelist_id.code or None" />
                 <div class="input-group-btn">
-                    <a role="button" class="btn btn-default a-submit">Apply</a>
+                    <a role="button" class="btn btn-secondary a-submit">Apply</a>
                 </div>
             </div>
         </form>
@@ -1057,7 +1057,7 @@
                                             <div class="col-sm-12 col-md-12 one_kanban">
                                                 <form action="/shop/address" method="post" class=''>
                                                     <input type="hidden" name="csrf_token" t-att-value="request.csrf_token()" />
-                                                    <a role="button" class='a-submit btn btn-default mb16 btn-block'>
+                                                    <a role="button" class='a-submit btn btn-secondary mb16 btn-block'>
                                                         <i class="fa fa-plus-square"></i> Add an address
                                                     </a>
                                                 </form>
@@ -1079,7 +1079,7 @@
                             </t>
                             <div class="clearfix" />
                             <div>
-                                <a role="button" href="/shop/cart" class="btn btn-default mb32">
+                                <a role="button" href="/shop/cart" class="btn btn-secondary mb32">
                                     <span class="fa fa-chevron-left" /> Return to Cart</a>
                                 <a role="button" class="btn btn-primary pull-right mb32 " href="/shop/confirm_order">Confirm <span class="fa fa-chevron-right" /></a>
                             </div>
@@ -1111,7 +1111,7 @@
                         </a>
                     </span>
                     <span class='btn-ship' t-att-style="'' if not selected else 'display:none;'">
-                        <a role="button" class="btn btn-block btn-default">
+                        <a role="button" class="btn btn-block btn-secondary">
                             Select this address
                         </a>
                     </span>
@@ -1251,7 +1251,7 @@
 
                                     <div class="clearfix"/>
                                     <div style='padding: 0 15px'>
-                                        <a role="button" t-att-href="mode == ('new', 'billing') and '/shop/cart' or '/shop/checkout'" class="btn btn-default mb32">
+                                        <a role="button" t-att-href="mode == ('new', 'billing') and '/shop/cart' or '/shop/checkout'" class="btn btn-secondary mb32">
                                             <span class="fa fa-chevron-left" /> Back
                                         </a>
                                         <a role="button" class="btn btn-primary pull-right mb32 a-submit a-submit-disable a-submit-loading">
@@ -1325,7 +1325,7 @@
 
                                     <t t-set="back_button_icon_class" t-value="'fa-chevron-left'"/>
                                     <t t-set="back_button_txt" t-value="'Return to Cart'"/>
-                                    <t t-set="back_button_class" t-value="'btn btn-default'"/>
+                                    <t t-set="back_button_class" t-value="'btn btn-secondary'"/>
                                     <t t-set="back_button_link" t-value="'/shop/cart'"/>
                                 </t>
                             </div>
@@ -1367,7 +1367,7 @@
                     <t t-call="website_sale.total">
                         <t t-set='no_rowspan'>1</t>
                     </t>
-                    <a role="button" t-if="website_sale_order and website_sale_order.website_order_line" class="btn btn-default pull-right mr8 d-none d-xl-inline-block" href="/shop/checkout?express=1">
+                    <a role="button" t-if="website_sale_order and website_sale_order.website_order_line" class="btn btn-secondary pull-right mr8 d-none d-xl-inline-block" href="/shop/checkout?express=1">
                         <span>Process Checkout</span>
                     </a>
                 </div>
diff --git a/addons/website_sale_comparison/views/website_sale_comparison_template.xml b/addons/website_sale_comparison/views/website_sale_comparison_template.xml
index 6d197da5e0f..b15e981ad02 100644
--- a/addons/website_sale_comparison/views/website_sale_comparison_template.xml
+++ b/addons/website_sale_comparison/views/website_sale_comparison_template.xml
@@ -10,14 +10,14 @@
 
     <template id="add_to_compare" inherit_id="website_sale.products_item" active="True" customize_show="True" name="Comparison List" priority="22">
         <xpath expr="//div[hasclass('product_price')]" position="inside">
-            <a role="button" class="d-none d-md-inline-block btn btn-default btn-xs o_add_compare" title="Compare" aria-label="Compare" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_comparelist"><span class="fa fa-exchange"></span></a>
+            <a role="button" class="d-none d-md-inline-block btn btn-secondary btn-xs o_add_compare" title="Compare" aria-label="Compare" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_comparelist"><span class="fa fa-exchange"></span></a>
         </xpath>
     </template>
 
     <template id="product_add_to_compare" name='Add to comparison in product page' inherit_id="website_sale.product" priority="8">
         <xpath expr="//a[@id='add_to_cart']" position="after">
             <t t-if="product.env.ref('website_sale_comparison.add_to_compare').active">
-                <a role="button" class="d-none d-md-inline-block btn btn-default btn-lg mt8 o_add_compare_dyn" title="Compare" aria-label="Compare" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_comparelist"><span class="fa fa-exchange"></span></a>
+                <a role="button" class="d-none d-md-inline-block btn btn-secondary btn-lg mt8 o_add_compare_dyn" title="Compare" aria-label="Compare" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_comparelist"><span class="fa fa-exchange"></span></a>
             </t>
         </xpath>
     </template>
diff --git a/addons/website_sale_digital/views/website_sale_digital.xml b/addons/website_sale_digital/views/website_sale_digital.xml
index de02b8cf1c5..92415355916 100644
--- a/addons/website_sale_digital/views/website_sale_digital.xml
+++ b/addons/website_sale_digital/views/website_sale_digital.xml
@@ -5,7 +5,7 @@
             <t t-set="attachments" t-value="digital_attachments.get(line.product_id.id)"/>
             <t t-if="attachments">
                 <span class="dropdown">
-                    <button class="btn btn-xs btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
+                    <button class="btn btn-xs btn-secondary dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
                         Downloads <span class="caret"></span>
                     </button>
                     <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
diff --git a/addons/website_sale_link_tracker/static/src/xml/website_sale_dashboard_utm_chart.xml b/addons/website_sale_link_tracker/static/src/xml/website_sale_dashboard_utm_chart.xml
index acd9ee9651d..73fa0bc3019 100644
--- a/addons/website_sale_link_tracker/static/src/xml/website_sale_dashboard_utm_chart.xml
+++ b/addons/website_sale_link_tracker/static/src/xml/website_sale_dashboard_utm_chart.xml
@@ -20,7 +20,7 @@
 
     <t t-name="website_sale.LinkTrackersDropDown">
         <div class="dropdown">
-            <button class="btn btn-default dropdown-toggle utm_dropdown ml4" id="utm_dropdown" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"><span class="utm_button_name">Campaigns</span><span class="caret ml4"/>
+            <button class="btn btn-secondary dropdown-toggle utm_dropdown ml4" id="utm_dropdown" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"><span class="utm_button_name">Campaigns</span><span class="caret ml4"/>
             </button>
             <ul class="dropdown-menu" role="menu" aria-labelledby="utm_dropdown">
                 <li><a role="menuitem" class="js_utm_selector" name="campaign_id">Campaigns</a></li>
diff --git a/addons/website_sale_options/views/website_sale_options_templates.xml b/addons/website_sale_options/views/website_sale_options_templates.xml
index 53dede7d207..3be328a3d27 100644
--- a/addons/website_sale_options/views/website_sale_options_templates.xml
+++ b/addons/website_sale_options/views/website_sale_options_templates.xml
@@ -134,7 +134,7 @@
           </table>
         </main>
         <footer class="modal-footer">
-          <a role="button" class="btn btn-default a-submit js_goto_shop" aria-label="Continue shopping" title="Continue shopping"><i class="fa fa-chevron-left"></i> <span class="d-none d-md-inline">Continue Shopping</span><span class="d-inline d-md-none">Continue</span></a>
+          <a role="button" class="btn btn-secondary a-submit js_goto_shop" aria-label="Continue shopping" title="Continue shopping"><i class="fa fa-chevron-left"></i> <span class="d-none d-md-inline">Continue Shopping</span><span class="d-inline d-md-none">Continue</span></a>
           <a role="button" class="btn btn-primary pull-right a-submit" aria-label="Proceed to checkout" title="Proceed to checkout"><i class="fa fa-shopping-cart fa-fw"></i> <span class="d-none d-md-inline">Proceed to Checkout</span><span class="d-inline d-md-none">Checkout</span></a>
         </footer>
       </div>
diff --git a/addons/website_sale_wishlist/views/website_sale_wishlist_template.xml b/addons/website_sale_wishlist/views/website_sale_wishlist_template.xml
index 9eb44e52f46..225143a5642 100644
--- a/addons/website_sale_wishlist/views/website_sale_wishlist_template.xml
+++ b/addons/website_sale_wishlist/views/website_sale_wishlist_template.xml
@@ -12,7 +12,7 @@
     <template id="add_to_wishlist" inherit_id="website_sale.products_item" active="True" customize_show="True" name="Wishlist" priority="20">
         <xpath expr="//div[hasclass('product_price')]" position="inside">
             <t t-set="in_wish" t-value="product.product_variant_ids &amp; request.env['product.wishlist'].current().mapped('product_id')"/>
-            <a role="button" class="btn btn-default btn-xs o_add_wishlist" t-att-disabled='in_wish or None' title="Add to Wishlist" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_wishlist"><span class="fa fa-heart" role="img" aria-label="Add to wishlist"></span></a>
+            <a role="button" class="btn btn-secondary btn-xs o_add_wishlist" t-att-disabled='in_wish or None' title="Add to Wishlist" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_wishlist"><span class="fa fa-heart" role="img" aria-label="Add to wishlist"></span></a>
         </xpath>
     </template>
 
@@ -20,7 +20,7 @@
         <xpath expr="//a[@id='add_to_cart']" position="after">
             <t t-if="product.env.ref('website_sale_wishlist.add_to_wishlist').active">
                 <t t-set="in_wish" t-value="product.product_variant_ids &amp; request.env['product.wishlist'].current().mapped('product_id')"/>
-                <a role="button" class="btn btn-default btn-lg mt8 o_add_wishlist_dyn" t-att-disabled='in_wish or None' title="Add to Wishlist" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_wishlist"><span class="fa fa-heart" role="img" aria-label="Add to wishlist"></span></a>
+                <a role="button" class="btn btn-secondary btn-lg mt8 o_add_wishlist_dyn" t-att-disabled='in_wish or None' title="Add to Wishlist" t-att-data-product-product-id="product.product_variant_ids[0].id" data-action="o_wishlist"><span class="fa fa-heart" role="img" aria-label="Add to wishlist"></span></a>
             </t>
         </xpath>
     </template>
@@ -73,7 +73,7 @@
                                         </td>
                                         <td class='text-center td-wish-btn'>
                                             <input name="product_id" t-att-value="wish.product_id.id" type="hidden"/>
-                                            <a role="button" class="btn btn-default btn-block o_wish_add mb4" >Add <span class='d-none d-md-inline'>to Cart</span></a>
+                                            <a role="button" class="btn btn-secondary btn-block o_wish_add mb4" >Add <span class='d-none d-md-inline'>to Cart</span></a>
                                         </td>
                                     </tr>
                                 </t>
diff --git a/addons/website_slides/static/src/xml/website_slides.xml b/addons/website_slides/static/src/xml/website_slides.xml
index 0df830eb5db..46074498ef0 100644
--- a/addons/website_slides/static/src/xml/website_slides.xml
+++ b/addons/website_slides/static/src/xml/website_slides.xml
@@ -68,7 +68,7 @@
                     <footer class="modal-footer">
                         <button type="button" data-loading-text="Loading..." class="btn btn-primary save">Save as Draft</button>
                         <button type="button" data-loading-text="Loading..." data-published="true" class="btn btn-primary save">Save and Publish</button>
-                        <button type="button" class="btn btn-default" data-dismiss="modal">Discard</button>
+                        <button type="button" class="btn btn-secondary" data-dismiss="modal">Discard</button>
                     </footer>
                 </div>
             </div>
diff --git a/addons/website_theme_install/views/views.xml b/addons/website_theme_install/views/views.xml
index 1522b751936..a310aa6f37a 100644
--- a/addons/website_theme_install/views/views.xml
+++ b/addons/website_theme_install/views/views.xml
@@ -26,7 +26,7 @@
                             <div states="uninstalled" class="o_button_area">
                                 <button type="object" name="button_choose_theme" class="btn btn-primary">Use this theme</button>
                                 <hr t-if="record.url.value"/>
-                                <a role="button" t-if="record.url.value" class="btn btn-default" t-att-href="record.url.value" target="_blank">Live Preview</a>
+                                <a role="button" t-if="record.url.value" class="btn btn-secondary" t-att-href="record.url.value" target="_blank">Live Preview</a>
                             </div>
                         </div>
                         <div class="o_theme_preview_bottom clearfix">
diff --git a/odoo/addons/base/data/ir_demo_data.xml b/odoo/addons/base/data/ir_demo_data.xml
index e108590147a..e0e42387ab4 100644
--- a/odoo/addons/base/data/ir_demo_data.xml
+++ b/odoo/addons/base/data/ir_demo_data.xml
@@ -15,7 +15,7 @@
                 <p>Are you sure you want to load demo data?</p>
                 <footer>
                     <button name="install_demo" string="Load demo data" type="object" class="btn-primary"/>
-                    <button special="cancel" string="Discard" class="btn-default"/>
+                    <button special="cancel" string="Discard" class="btn-secondary"/>
                 </footer>
             </form>
         </field>
diff --git a/odoo/addons/base/tests/test_views.py b/odoo/addons/base/tests/test_views.py
index 3a417ba61ca..ab137d70ed6 100644
--- a/odoo/addons/base/tests/test_views.py
+++ b/odoo/addons/base/tests/test_views.py
@@ -866,7 +866,7 @@ class TestViews(ViewCase):
                     <separator name="separator" string="Separator" colspan="4"/>
                     <footer>
                         <button name="action_next" type="object" string="Next button" class="btn-primary"/>
-                        <button string="Skip" special="cancel" class="btn-default"/>
+                        <button string="Skip" special="cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             """
@@ -991,7 +991,7 @@ class TestViews(ViewCase):
                     <separator name="separator" string="Separator" colspan="4"/>
                     <footer>
                         <button name="action_next" type="object" string="Next button" class="btn-primary"/>
-                        <button string="Skip" special="cancel" class="btn-default"/>
+                        <button string="Skip" special="cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             """
diff --git a/odoo/addons/base/views/ir_model_views.xml b/odoo/addons/base/views/ir_model_views.xml
index b20c49a413d..f8ab6ed25fa 100644
--- a/odoo/addons/base/views/ir_model_views.xml
+++ b/odoo/addons/base/views/ir_model_views.xml
@@ -13,7 +13,7 @@
                     </group>
                     <footer>
                         <button name="menu_create" string="Create _Menu" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/views/ir_module_views.xml b/odoo/addons/base/views/ir_module_views.xml
index 99fdf5b91eb..d873046b4c1 100644
--- a/odoo/addons/base/views/ir_module_views.xml
+++ b/odoo/addons/base/views/ir_module_views.xml
@@ -68,10 +68,10 @@
                         <div>
                             <button name="button_immediate_install" states="uninstalled" string="Install" type="object" class="btn btn-primary"/>
                             <button name="button_immediate_upgrade" states="installed" string="Upgrade" type="object" class="btn btn-primary"/>
-                            <button name="button_uninstall_wizard" states="installed" string="Uninstall" type="object"  class="btn btn-default"/>
-                            <button name="button_uninstall_cancel" states="to remove" string="Cancel Uninstall" type="object" class="btn btn-default"/>
-                            <button name="button_upgrade_cancel" states="to upgrade" string="Cancel Upgrade" type="object" class="btn btn-default"/>
-                            <button name="button_install_cancel" states="to install" string="Cancel Install" type="object" class="btn btn-default"/>
+                            <button name="button_uninstall_wizard" states="installed" string="Uninstall" type="object"  class="btn btn-secondary"/>
+                            <button name="button_uninstall_cancel" states="to remove" string="Cancel Uninstall" type="object" class="btn btn-secondary"/>
+                            <button name="button_upgrade_cancel" states="to upgrade" string="Cancel Upgrade" type="object" class="btn btn-secondary"/>
+                            <button name="button_install_cancel" states="to install" string="Cancel Install" type="object" class="btn btn-secondary"/>
                         </div>
                     </div>
                     <div class="oe_clear"/>
diff --git a/odoo/addons/base/views/onboarding_views.xml b/odoo/addons/base/views/onboarding_views.xml
index 470e78157ec..6da8ab74e24 100644
--- a/odoo/addons/base/views/onboarding_views.xml
+++ b/odoo/addons/base/views/onboarding_views.xml
@@ -25,7 +25,7 @@
                                     This action is definitive.
                                 </div>
                                 <div class="modal-footer">
-                                    <button type="button" class="btn btn-default" data-dismiss="modal">
+                                    <button type="button" class="btn btn-secondary" data-dismiss="modal">
                                         No
                                     </button>
                                     <a type="action" class="btn btn-primary" data-dismiss="modal"
diff --git a/odoo/addons/base/views/res_config_views.xml b/odoo/addons/base/views/res_config_views.xml
index d4c3d760c02..f8cadae3bd6 100644
--- a/odoo/addons/base/views/res_config_views.xml
+++ b/odoo/addons/base/views/res_config_views.xml
@@ -10,7 +10,7 @@
                     <group name="res_config_contents"/>
                     <footer>
                         <button name="action_next" type="object" string="Apply" class="btn-primary"/>
-                        <button name="action_skip" type="object" special="cancel" string="Cancel" class="btn-default"/>
+                        <button name="action_skip" type="object" special="cancel" string="Cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
@@ -24,7 +24,7 @@
                     <separator string="title" colspan="4"/>
                     <footer>
                         <button name="action_next" type="object" string="Install Apps" class="btn-primary"/>
-                        <button string="Skip" class="btn-default" special="cancel" />
+                        <button string="Skip" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/views/res_users_views.xml b/odoo/addons/base/views/res_users_views.xml
index 9135eca564a..ea676aac324 100644
--- a/odoo/addons/base/views/res_users_views.xml
+++ b/odoo/addons/base/views/res_users_views.xml
@@ -11,7 +11,7 @@
                     <field name="user_ids"/>
                     <footer>
                         <button string="Change Password" name="change_password_button" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
@@ -370,7 +370,7 @@
                     </group>
                     <footer>
                         <button name="preference_save" type="object" string="Save" class="btn-primary"/>
-                        <button name="preference_cancel" string="Cancel" special="cancel" class="btn-default"/>
+                        <button name="preference_cancel" string="Cancel" special="cancel" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/wizard/base_export_language_views.xml b/odoo/addons/base/wizard/base_export_language_views.xml
index f06dc590156..f177c8a60a4 100644
--- a/odoo/addons/base/wizard/base_export_language_views.xml
+++ b/odoo/addons/base/wizard/base_export_language_views.xml
@@ -32,7 +32,7 @@
                     </div>
                     <footer states="choose">
                         <button name="act_getfile" string="Export" type="object" class="btn-primary"/>
-                        <button special="cancel" string="Cancel" type="object" class="btn-default"/>
+                        <button special="cancel" string="Cancel" type="object" class="btn-secondary"/>
                     </footer>
                     <footer states="get">
                         <button special="cancel" string="Close" type="object" class="btn-primary"/>
diff --git a/odoo/addons/base/wizard/base_import_language_views.xml b/odoo/addons/base/wizard/base_import_language_views.xml
index 7fb452f4853..70ebb4a78c7 100644
--- a/odoo/addons/base/wizard/base_import_language_views.xml
+++ b/odoo/addons/base/wizard/base_import_language_views.xml
@@ -16,7 +16,7 @@
                     </group>
                     <footer>
                         <button name="import_lang" string="_Import" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel" />
+                        <button string="Cancel" class="btn-secondary" special="cancel" />
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/wizard/base_language_install_views.xml b/odoo/addons/base/wizard/base_language_install_views.xml
index 936197d810e..8f8901a409a 100644
--- a/odoo/addons/base/wizard/base_language_install_views.xml
+++ b/odoo/addons/base/wizard/base_language_install_views.xml
@@ -18,7 +18,7 @@ You must change the preferences of the user to view the changes.</span>
                     </group>
                     <footer states="init">
                         <button name="lang_install" string="Load" type="object" class="btn-primary"/>
-                        <button special="cancel" string="Cancel" class="btn-default"/>
+                        <button special="cancel" string="Cancel" class="btn-secondary"/>
                     </footer>
                     <footer states="done">
                         <button name="reload" string="Close" type="object" class="btn-primary"/>
diff --git a/odoo/addons/base/wizard/base_module_uninstall_views.xml b/odoo/addons/base/wizard/base_module_uninstall_views.xml
index 4f10bebc276..00a493637f6 100644
--- a/odoo/addons/base/wizard/base_module_uninstall_views.xml
+++ b/odoo/addons/base/wizard/base_module_uninstall_views.xml
@@ -42,7 +42,7 @@
                     </field>
                     <footer>
                         <button string="Confirm" class="btn-primary" type="object" name="action_uninstall"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/wizard/base_module_update_views.xml b/odoo/addons/base/wizard/base_module_update_views.xml
index e465479e6ff..478d548e7b6 100644
--- a/odoo/addons/base/wizard/base_module_update_views.xml
+++ b/odoo/addons/base/wizard/base_module_update_views.xml
@@ -19,11 +19,11 @@
                     <footer>
                         <div states="init">
                             <button name="update_module" string="Update" type="object" class="btn-primary"/>
-                            <button special="cancel" string="Cancel" class="btn-default"/>
+                            <button special="cancel" string="Cancel" class="btn-secondary"/>
                         </div>
                         <div states="done">
                             <button name="action_module_open" string="Open Apps" type="object" class="btn-primary"/>
-                            <button special="cancel" string="Close" class="btn-default"/>
+                            <button special="cancel" string="Close" class="btn-secondary"/>
                         </div>
                     </footer>
                 </form>
diff --git a/odoo/addons/base/wizard/base_module_upgrade.py b/odoo/addons/base/wizard/base_module_upgrade.py
index bd0875d1cba..07475ffeaf9 100644
--- a/odoo/addons/base/wizard/base_module_upgrade.py
+++ b/odoo/addons/base/wizard/base_module_upgrade.py
@@ -36,7 +36,7 @@ class BaseModuleUpgrade(models.TransientModel):
                                 <separator string="Upgrade Completed" colspan="4"/>
                                 <footer>
                                     <button name="config" string="Start Configuration" type="object" class="btn-primary"/>
-                                    <button special="cancel" string="Close" class="btn-default"/>
+                                    <button special="cancel" string="Close" class="btn-secondary"/>
                                 </footer>
                              </form>'''
 
diff --git a/odoo/addons/base/wizard/base_module_upgrade_views.xml b/odoo/addons/base/wizard/base_module_upgrade_views.xml
index 53bf47d409f..d8301c636f0 100644
--- a/odoo/addons/base/wizard/base_module_upgrade_views.xml
+++ b/odoo/addons/base/wizard/base_module_upgrade_views.xml
@@ -14,7 +14,7 @@
                     <field name="module_info"/>
                     <footer>
                         <button name="upgrade_module" string="Confirm" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" name="upgrade_module_cancel" type="object"/>
+                        <button string="Cancel" class="btn-secondary" name="upgrade_module_cancel" type="object"/>
                     </footer>
                 </form>
             </field>
@@ -47,7 +47,7 @@
                     <div><span class="o_form_label">We suggest to reload the menu tab to see the new menus (Ctrl+T then Ctrl+R)."</span></div>
                     <footer>
                         <button name="config" string="Start configuration" type="object" class="btn-primary"/>
-                        <button string="Cancel" class="btn-default" special="cancel"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/wizard/base_partner_merge_views.xml b/odoo/addons/base/wizard/base_partner_merge_views.xml
index 153f5eee01c..c4afd88378e 100644
--- a/odoo/addons/base/wizard/base_partner_merge_views.xml
+++ b/odoo/addons/base/wizard/base_partner_merge_views.xml
@@ -92,8 +92,8 @@
                             type='object'
                             confirm="Are you sure to execute the list of automatic merges of your contacts ?"
                             attrs="{'invisible': [('state', '!=', 'option')]}" />
-                        <button special="cancel" string="Cancel" type="object" class="btn btn-default oe_inline" attrs="{'invisible': [('state', '=', 'finished')]}"/>
-                        <button special="cancel" string="Close" type="object" class="btn btn-default oe_inline" attrs="{'invisible': [('state', '!=', 'finished')]}"/>
+                        <button special="cancel" string="Cancel" type="object" class="btn btn-secondary oe_inline" attrs="{'invisible': [('state', '=', 'finished')]}"/>
+                        <button special="cancel" string="Close" type="object" class="btn btn-secondary oe_inline" attrs="{'invisible': [('state', '!=', 'finished')]}"/>
                     </footer>
                 </form>
             </field>
diff --git a/odoo/addons/base/wizard/base_update_translations_views.xml b/odoo/addons/base/wizard/base_update_translations_views.xml
index 42baf0b04af..8b1e7c69788 100644
--- a/odoo/addons/base/wizard/base_update_translations_views.xml
+++ b/odoo/addons/base/wizard/base_update_translations_views.xml
@@ -11,7 +11,7 @@
                     </group>
                     <footer>
                         <button name="act_update" string="Update" type="object" class="btn-primary"/>
-                        <button special="cancel" string="Cancel" type="object" class="btn-default"/>
+                        <button special="cancel" string="Cancel" type="object" class="btn-secondary"/>
                     </footer>
                 </form>
             </field>