diff --git a/css/custom.sass b/css/custom.sass
index fc14ab2..8d5230b 100644
--- a/css/custom.sass
+++ b/css/custom.sass
@@ -43,6 +43,7 @@ abbr, acronym
 
 #ads
     padding: 2em 0
+    background-color: rgba(black, 0.1)
 
 #comments
     clear: both