diff --git a/src/css/user-rules.css b/src/css/user-rules.css
index 51c07e7..8142edb 100644
--- a/src/css/user-rules.css
+++ b/src/css/user-rules.css
@@ -139,7 +139,6 @@ body[dir="rtl"] #commitButton:before {
     text-decoration: line-through;
     }
 #diff textarea {
-    background-color: #f8f8ff;
     border: 0;
     border-top: 1px solid #eee;
     direction: ltr;