diff --git a/public/resources/css/module/_heading-code.scss b/public/resources/css/module/_heading-code.scss
index d67b2ea396..1072f4fa40 100644
--- a/public/resources/css/module/_heading-code.scss
+++ b/public/resources/css/module/_heading-code.scss
@@ -1,6 +1,6 @@
 h1, h2, h3, h4 {
   .prettyprint {
-    background: $snow;
+    background: none;
     font-family: $mono-font;
     color: $steel;
     overflow: hidden;