diff --git a/addons/website_slides/models/slide_channel_tag.py b/addons/website_slides/models/slide_channel_tag.py
index 67c62cf742d..04cea1657f9 100644
--- a/addons/website_slides/models/slide_channel_tag.py
+++ b/addons/website_slides/models/slide_channel_tag.py
@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+from random import randint
+
 from odoo import fields, models
 
 
@@ -30,4 +32,6 @@ class SlideChannelTag(models.Model):
         'Group sequence', related='group_id.sequence',
         index=True, readonly=True, store=True)
     channel_ids = fields.Many2many('slide.channel', 'slide_channel_tag_rel', 'tag_id', 'channel_id', string='Channels')
-    color = fields.Integer(string='Color Index', help="Color to apply to this tag (including in website).")
+    color = fields.Integer(
+        string='Color Index', default=lambda self: randint(1, 11),
+        help="Tag color used in both backend and website. No color means no display in kanban or front-end, to distinguish internal tags from public categorization tags")
diff --git a/addons/website_slides/security/website_slides_security.xml b/addons/website_slides/security/website_slides_security.xml
index ab800865dd0..f8689d090ce 100644
--- a/addons/website_slides/security/website_slides_security.xml
+++ b/addons/website_slides/security/website_slides_security.xml
@@ -75,6 +75,17 @@
             <field name="perm_create" eval="1"/>
         </record>
 
+        <record id="rule_slide_channel_tag_public" model="ir.rule">
+            <field name="name">Channel Tag: public/portal: color = published</field>
+            <field name="model_id" ref="model_slide_channel_tag"/>
+            <field name="domain_force">['&amp;', ('color', '!=', False), ('color', '!=', 0)]</field>
+            <field name="groups" eval="[(4, ref('base.group_public')), (4, ref('base.group_portal'))]"/>
+            <field name="perm_read" eval="True"/>
+            <field name="perm_write" eval="False"/>
+            <field name="perm_create" eval="False"/>
+            <field name="perm_unlink" eval="False"/>
+        </record>
+
         <!-- SLIDE -->
         <record id="rule_slide_slide_global" model="ir.rule">
             <field name="name">Slide: always visible (sub rules exist)</field>
diff --git a/addons/website_slides/static/src/js/slides_course_tag_add.js b/addons/website_slides/static/src/js/slides_course_tag_add.js
index b62e9cf0809..9fbbbec502e 100644
--- a/addons/website_slides/static/src/js/slides_course_tag_add.js
+++ b/addons/website_slides/static/src/js/slides_course_tag_add.js
@@ -67,7 +67,7 @@ var TagCourseDialog = Dialog.extend({
                     route: '/slides/channel/tag/search_read',
                     params: {
                         fields: ['name'],
-                        domain: [['id','not in',self.tagIds]],
+                        domain: [['id', 'not in', self.tagIds], ['color', '!=', 0]],
                     }
                 });
             })
diff --git a/addons/website_slides/views/slide_channel_tag_views.xml b/addons/website_slides/views/slide_channel_tag_views.xml
index b4c4e9ab12e..7edb459c7c3 100644
--- a/addons/website_slides/views/slide_channel_tag_views.xml
+++ b/addons/website_slides/views/slide_channel_tag_views.xml
@@ -63,24 +63,24 @@
         <field name="arch" type="xml">
             <form string="Course Tag Group">
                 <sheet>
+                    <div class="oe_title">
+                        <label for="name" class="oe_edit_only" string="Course Group Name"/>
+                        <h1><field name="name" default_focus="1" placeholder="Course Group Name"/></h1>
+                        <label for="is_published" string="Menu Entry"/>
+                        <field name="is_published"/><br/>
+                    </div>
                     <group>
-                        <div class="oe_title">
-                            <label for="name" class="oe_edit_only" string="Group Name"/>
-                            <h1><field name="name" default_focus="1" placeholder="Group Name"/></h1>
-                            <label for="is_published" string="Menu Entry"/>
-                            <field name="is_published"/><br/>
-                            <field name="tag_ids">
-                                <tree editable="bottom">
-                                    <field name="sequence" widget="handle"/>
-                                    <field name="group_sequence" invisible="1"/>
-                                    <field name="name" string="Tag Name"/>
-                                    <field name="color" string="Color" widget="color_picker"/>
-                                    <control>
-                                        <create string="Add a tag"/>
-                                    </control>
-                                </tree>
-                            </field>
-                        </div>
+                        <field name="tag_ids">
+                            <tree editable="bottom">
+                                <field name="sequence" widget="handle"/>
+                                <field name="group_sequence" invisible="1"/>
+                                <field name="name" string="Tag Name"/>
+                                <field name="color" string="Color" widget="color_picker"/>
+                                <control>
+                                    <create string="Add a tag"/>
+                                </control>
+                            </tree>
+                        </field>
                     </group>
                 </sheet>
             </form>
@@ -95,6 +95,7 @@
                 <field name="sequence" widget="handle"/>
                 <field name="name"/>
                 <field name="is_published" string="Menu Entry"/>
+                <field name="tag_ids" widget="many2many_tags" options="{'color_field': 'color'}"/>
             </tree>
         </field>
     </record>
diff --git a/addons/website_slides/views/slide_channel_views.xml b/addons/website_slides/views/slide_channel_views.xml
index 04a6363fc94..371b3f5602c 100644
--- a/addons/website_slides/views/slide_channel_views.xml
+++ b/addons/website_slides/views/slide_channel_views.xml
@@ -245,7 +245,7 @@
                                             </a>
                                         </div>
                                         <div t-if="record.tag_ids">
-                                            <field name="tag_ids" widget="many2many_tags"/>
+                                            <field name="tag_ids" widget="many2many_tags"  options="{'color_field': 'color'}"/>
                                         </div>
                                     </div>
                                 </div>
diff --git a/addons/website_slides/views/website_slides_templates_course.xml b/addons/website_slides/views/website_slides_templates_course.xml
index 3be29e4f2aa..c65fd96fc70 100644
--- a/addons/website_slides/views/website_slides_templates_course.xml
+++ b/addons/website_slides/views/website_slides_templates_course.xml
@@ -168,6 +168,7 @@
             </t>
 
             <div class="o_wslides_course_main">
+                <t t-set="channel_frontend_tags" t-value="channel.tag_ids.filtered(lambda tag: tag.color)"/>
                 <!-- ========== TRAINING COURSE ========== -->
                 <div t-if="channel.channel_type == 'training'" class="container">
                     <div class="row">
@@ -198,8 +199,8 @@
                             <div class="tab-content py-4 o_wslides_tabs_content mb-4" id="courseMainTabContent">
                                 <div t-att-class="'tab-pane fade %s' % ('show active' if active_tab == 'home' else '')" id="home" role="tabpanel" aria-labelledby="home-tab">
                                     <div class="mb-2 pt-1">
-                                        <t t-if="channel.tag_ids">
-                                            <t t-foreach="channel.tag_ids" t-as="channel_tag">
+                                        <t t-if="channel_frontend_tags">
+                                            <t t-foreach="channel_frontend_tags" t-as="channel_tag">
                                                 <span t-attf-class="badge o_wslides_channel_tag #{'o_tag_color_'+str(channel_tag.color)}" t-esc="channel_tag.name"/>
                                             </t>
                                         </t>
@@ -699,8 +700,8 @@
     <div class="container">
         <div class="row">
             <div class="mb-2 pt-1 text-left col">
-                <t t-if="channel.tag_ids">
-                    <t t-foreach="channel.tag_ids" t-as="channel_tag">
+                <t t-if="channel_frontend_tags">
+                    <t t-foreach="channel_frontend_tags" t-as="channel_tag">
                         <span t-attf-class="badge o_wslides_channel_tag #{'o_tag_color_'+str(channel_tag.color)}" t-esc="channel_tag.name"/>
                     </t>
                 </t>
diff --git a/addons/website_slides/views/website_slides_templates_homepage.xml b/addons/website_slides/views/website_slides_templates_homepage.xml
index 48360fae5a6..132602a2dfd 100644
--- a/addons/website_slides/views/website_slides_templates_homepage.xml
+++ b/addons/website_slides/views/website_slides_templates_homepage.xml
@@ -215,7 +215,8 @@
                         <t t-set="search_tag_groups" t-value="search_tags.mapped('group_id')"/>
                         <ul class="navbar-nav flex-grow-1">
                             <t t-foreach="tag_groups" t-as="tag_group">
-                                <li t-att-class="'nav-item dropdown ml16 %s' % ('active' if tag_group in search_tag_groups else '')">
+                                <t t-set="group_frontend_tags" t-value="tag_group.tag_ids.filtered(lambda tag: tag.color)"/>
+                                <li t-att-class="'nav-item dropdown ml16 %s' % ('active' if tag_group in search_tag_groups else '')" t-if="group_frontend_tags">
                                     <a class="nav-link dropdown-toggle"
                                         href="/slides/all"
                                         t-att-data-target="'#navToogleTagGroup%s' % tag_group.id"
@@ -223,7 +224,7 @@
                                         aria-haspopup="true" aria-expanded="false"
                                         t-esc="tag_group.name"/>
                                     <div class="dropdown-menu" t-att-id="'navToogleTagGroup%s' % tag_group.id">
-                                        <t t-foreach="tag_group.tag_ids" t-as="tag">
+                                        <t t-foreach="group_frontend_tags" t-as="tag">
                                             <a rel="nofollow" t-att-class="'dropdown-item post_link %s' % ('active' if tag in search_tags else '')"
                                                 t-att-href="slide_query_url(tag=slugify_tags(search_tags.ids, toggle_tag_id=tag.id), my=search_my, search=search_term, slide_type=search_slide_type)"
                                                 t-esc="tag.name"/>
@@ -319,6 +320,7 @@
 <template id='course_card' name="Course Card">
     <div t-attf-class="card w-100 o_wslides_course_card mb-4 #{'o_wslides_course_unpublished' if not channel.is_published else ''}">
         <t t-set="course_image" t-value="website.image_url(channel, 'image_1024')"/>
+        <t t-set="channel_frontend_tags" t-value="channel.tag_ids.filtered(lambda tag: tag.color)"/>
         <a t-attf-href="/slides/#{slug(channel)}" t-title="channel.name">
             <t t-if="channel.partner_has_new_content" t-call="website_slides.course_card_information"/> 
             <div t-if="channel.image_1024" class="card-img-top" t-attf-style="padding-top: 50%; background-image: url(#{course_image}); background-size: cover; background-position:center"/>
@@ -331,8 +333,8 @@
             <span t-if="not channel.is_published" class="badge badge-danger p-1">Unpublished</span>
             <div class="card-text mt-1">
                 <div class="font-weight-light o_wslides_desc_truncate_3" t-field="channel.description_short"/>
-                <div t-if="channel.tag_ids" class="mt-2 pt-1 o_wslides_desc_truncate_2">
-                    <t t-foreach="channel.tag_ids" t-as="tag">
+                <div t-if="channel_frontend_tags" class="mt-2 pt-1 o_wslides_desc_truncate_2">
+                    <t t-foreach="channel_frontend_tags" t-as="tag">
                         <t t-if="search_tags">
                             <a t-att-href="slide_query_url(tag=slugify_tags(search_tags.ids, toggle_tag_id=tag.id), my=search_my, search=search_term, slide_type=search_slide_type)" t-attf-class="badge post_link #{'badge-primary' if tag in search_tags else 'o_wslides_channel_tag o_tag_color_0'}" t-att-rel="search_tags and 'nofollow'" t-esc="tag.name"/>
                         </t>
diff --git a/addons/website_slides/views/website_slides_templates_profile.xml b/addons/website_slides/views/website_slides_templates_profile.xml
index 2970e3a739c..142458718ca 100644
--- a/addons/website_slides/views/website_slides_templates_profile.xml
+++ b/addons/website_slides/views/website_slides_templates_profile.xml
@@ -49,7 +49,7 @@
                             <h5 class="mt-0 mb-1" t-field="course.channel_id.name"/>
 
                             <div class="overflow-hidden mb-1" style="height:24px">
-                                <t t-foreach="course.channel_id.tag_ids" t-as="tag">
+                                <t t-foreach="course.channel_id.tag_ids.filtered(lambda tag: tag.color)" t-as="tag">
                                     <a t-att-href="'/slides/all/tag/%s' % slug(tag)" t-attf-class="badge o_wslides_channel_tag post_link #{'o_tag_color_'+str(tag.color)}" t-esc="tag.name"/>
                                 </t>
                             </div>