diff --git a/mail/templates/default/app.css b/mail/templates/default/app.css
index 0118c09ccb..931224e8ac 100644
--- a/mail/templates/default/app.css
+++ b/mail/templates/default/app.css
@@ -663,7 +663,6 @@ div.mailPreviewHeaders #mail-index_previewAttachmentArea.visible {
 	background-image: url(../../../phpgwapi/templates/default/images/ajax-loader.gif);
 	background-position: left top;
 	background-repeat: no-repeat;
-	background-color: rgba(255,255,255,0.5);
 }
 
 .mail_subscription_header
diff --git a/mail/templates/pixelegg/app.css b/mail/templates/pixelegg/app.css
index 4f552fcf7e..ef97920d60 100755
--- a/mail/templates/pixelegg/app.css
+++ b/mail/templates/pixelegg/app.css
@@ -659,7 +659,6 @@ div.mailPreviewHeaders #mail-index_previewAttachmentArea.visible {
   background-image: url(../../../phpgwapi/templates/default/images/ajax-loader.gif);
   background-position: left top;
   background-repeat: no-repeat;
-  background-color: rgba(255, 255, 255, 0.5);
 }
 .mail_subscription_header {
   font-weight: bold;