diff --git a/addons/account/static/src/components/journal_dashboard_activity/journal_dashboard_activity.xml b/addons/account/static/src/components/journal_dashboard_activity/journal_dashboard_activity.xml
index 1dc87594d9b..2c83438494e 100644
--- a/addons/account/static/src/components/journal_dashboard_activity/journal_dashboard_activity.xml
+++ b/addons/account/static/src/components/journal_dashboard_activity/journal_dashboard_activity.xml
@@ -7,7 +7,7 @@
             <div class="row">
                 <div class="col-8 o_mail_activity">
                     <a href="#"
-                       t-att-class="(activity.status == 'late' ? 'o_activity_color_overdue ' : ' ') + (activity.activity_category == 'tax_report' ? 'o_open_vat_report' : 'see_activity')"
+                       t-att-class="(activity.status == 'late' ? 'text-danger ' : ' ') + (activity.activity_category == 'tax_report' ? 'o_open_vat_report' : 'see_activity')"
                        t-att-data-res-id="activity.res_id" t-att-data-id="activity.id" t-att-data-model="activity.res_model"
                        t-on-click.stop.prevent="() => this.openActivity(activity)">
                         <t t-out="activity.name"/>
diff --git a/addons/mail/static/src/scss/mail_activity.scss b/addons/mail/static/src/scss/mail_activity.scss
index eda8687fe64..0f0e589fcf3 100644
--- a/addons/mail/static/src/scss/mail_activity.scss
+++ b/addons/mail/static/src/scss/mail_activity.scss
@@ -3,30 +3,6 @@
     &.o_field_widget {
         display: block;
     }
-
-    .o_activity_color_default {
-        color: #dddddd;
-    }
-
-    .o_activity_color_planned {
-        @extend .text-success;
-    }
-    .o_activity_color_overdue {
-        @extend .text-danger;
-    }
-    .o_activity_color_today {
-        @extend .text-warning;
-    }
-}
-
-/* Feedback popover (form view) */
-.o_mail_activity_feedback {
-    max-width: 410px;
-    outline: none;
-
-    textarea {
-        min-width: 250px;
-    }
 }
 
 /* list_activity widget */