diff --git a/static/css/style.css b/static/css/style.css
index 0b51cd65..21310301 100644
--- a/static/css/style.css
+++ b/static/css/style.css
@@ -26,6 +26,7 @@ hr {
 pre {
   border: 1px solid #ddd;
   box-shadow: 5px 5px 5px #eee;
+  background: #f8f8f8;
   padding: 1em;
   overflow-x: auto;
 }