diff --git a/mail/templates/mobile/app.css b/mail/templates/mobile/app.css
index 0976856372..884366f76f 100644
--- a/mail/templates/mobile/app.css
+++ b/mail/templates/mobile/app.css
@@ -1009,7 +1009,6 @@ body {
   box-shadow: 0px 0px 0px rgba(0, 0, 0, 0);
 }
 #mail-index div.splitter-bar {
-  background-color: rgba(179, 39, 39, 0);
   border-right: 0;
   border-top: 0;
   border-bottom: 0;
diff --git a/mail/templates/pixelegg/app.css b/mail/templates/pixelegg/app.css
index e786cc1b66..cb51d873eb 100755
--- a/mail/templates/pixelegg/app.css
+++ b/mail/templates/pixelegg/app.css
@@ -997,7 +997,6 @@ body {
   box-shadow: 0px 0px 0px rgba(0, 0, 0, 0);
 }
 #mail-index div.splitter-bar {
-  background-color: rgba(179, 39, 39, 0);
   border-right: 0;
   border-top: 0;
   border-bottom: 0;
diff --git a/mail/templates/pixelegg/app.less b/mail/templates/pixelegg/app.less
index a2aea8568d..08d451cf30 100755
--- a/mail/templates/pixelegg/app.less
+++ b/mail/templates/pixelegg/app.less
@@ -88,7 +88,6 @@ body {
 		tr.mail div span {.box_shadow_none;}
 	} // Ende: Box mit Header und Liste
 	div.splitter-bar {
-		background-color: rgba(179, 39, 39, 0);
 		border-right: 0;
 		border-top: 0;
 		border-bottom: 0;