diff --git a/lib/sass/popovers.scss b/lib/sass/popovers.scss
index 50098dc..6d0f3cc 100644
--- a/lib/sass/popovers.scss
+++ b/lib/sass/popovers.scss
@@ -106,6 +106,7 @@
   bottom: 0;
   left: 0;
   z-index: 10;
+  background-color: rgba(0,0,0,.5);
 }
 
 // Block level buttons in popovers