diff --git a/addons/mail/static/src/components/notification_list/notification_list_item.scss b/addons/mail/static/src/components/notification_list/notification_list_item.scss
index af98a9fb661..9140800ef86 100644
--- a/addons/mail/static/src/components/notification_list/notification_list_item.scss
+++ b/addons/mail/static/src/components/notification_list/notification_list_item.scss
@@ -143,7 +143,7 @@ $o-mail-notification-list-item-muted-hover-background-color:
 @mixin o-mail-notification-list-item-date-style() {
     @include o-mail-notification-list-item-bold-style();
     font-size: x-small;
-    color: $o-brand-primary;
+    color: gray('500');
 }
 
 @mixin o-mail-notification-list-item-image-style {
diff --git a/addons/mail/static/src/components/thread_preview/thread_preview.scss b/addons/mail/static/src/components/thread_preview/thread_preview.scss
index 772d63e2056..aa0c921a9ae 100644
--- a/addons/mail/static/src/components/thread_preview/thread_preview.scss
+++ b/addons/mail/static/src/components/thread_preview/thread_preview.scss
@@ -94,10 +94,6 @@
 
 .o_ThreadPreview_date {
     @include o-mail-notification-list-item-date-style();
-
-    &.o-muted {
-        color: gray('500');
-    }
 }
 
 .o_ThreadPreview_image {