diff --git a/addons/mass_mailing/static/src/css/mass_mailing_popup.css b/addons/mass_mailing/static/src/css/mass_mailing_popup.css
index 540a3e3a622..084cc2a2ce6 100644
--- a/addons/mass_mailing/static/src/css/mass_mailing_popup.css
+++ b/addons/mass_mailing/static/src/css/mass_mailing_popup.css
@@ -229,15 +229,9 @@ fieldset[disabled] #o_newsletter_popup .btn.btn-success.active {
   position: absolute;
   top: -0.1em;
   margin-left: -0.65em;
-  background: -webkit-linear-gradient(#bf70a9, #a24689);
-  -webkit-background-clip: text;
-  -webkit-text-fill-color: transparent;
 }
 #o_newsletter_popup .o_popup_modal_content .o_popup_modal_body .o_popup_content_dev .o_popup_message strong {
   color: #a24689;
-  background: -webkit-linear-gradient(#bf70a9, #a24689);
-  -webkit-background-clip: text;
-  -webkit-text-fill-color: transparent;
 }
 #o_newsletter_popup .o_popup_modal_content .o_popup_modal_body .o_popup_content_dev .o_message_paragraph {
   position: relative;