diff --git a/app/less/app.less b/app/less/app.less
index 254b32b3..dee29119 100644
--- a/app/less/app.less
+++ b/app/less/app.less
@@ -1244,7 +1244,7 @@ a.im_dialog_selected {
     display: none;
   }
   &_muted {
-    background: #ccc;
+    background: #bfbfbf;
   }
 }