diff --git a/app/assets/stylesheets/common/base/onebox.scss b/app/assets/stylesheets/common/base/onebox.scss
index 694ea8214a..4c0a9f357b 100644
--- a/app/assets/stylesheets/common/base/onebox.scss
+++ b/app/assets/stylesheets/common/base/onebox.scss
@@ -98,6 +98,7 @@ aside.onebox {
   margin-bottom: 1em;
   padding: 12px 25px 12px 12px;
   font-size: $font-0;
+  background: $secondary;
 
   header {
     margin-bottom: 8px;