--- a/gtk-3.0/gtk-widgets.css
+++ b/gtk-3.0/gtk-widgets.css
@@ -1106,6 +1106,7 @@
 .menubar .menuitem {
 	border-style: none;
 	padding: 3px 5px;
+	background-color: transparent;
 }
 
 .menubar .menuitem:hover {