diff --git a/core/themes/seven/css/jquery.ui.theme.css b/core/themes/seven/css/jquery.ui.theme.css
index 8cfc67e5b8860f3cdc813c218e6098bdc512b72e..89089d8923b70092c2bdbfc0742e4ab4160e7bf3 100644
--- a/core/themes/seven/css/jquery.ui.theme.css
+++ b/core/themes/seven/css/jquery.ui.theme.css
@@ -11,6 +11,7 @@
   background: none;
 }
 .ui-widget-content {
+  background: #fff;
   border: none;
 }