diff --git a/app/less/app.less b/app/less/app.less
index 388b3fc44..23f07a543 100644
--- a/app/less/app.less
+++ b/app/less/app.less
@@ -1386,7 +1386,7 @@ a.im_dialog_selected {
     display: none;
   }
   &_muted {
-    background: #bfbfbf;
+    background: #a4a4a4;
   }
 }