diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index 4d6f7a1b4..3d1045198 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -8670,8 +8670,7 @@ ul#new-menu {
   margin-top: 15px;
 }
 #running .panel-group .panel .panel-heading {
-  background-color: #eee;
-  /* @page-backdrop-color */
+  background-color: #eeeeee;
   padding-top: 4px;
   padding-bottom: 4px;
   padding-left: 7px;