diff --git a/css/index.css b/css/index.css
index 6d3bbfc..4dbaeea 100644
--- a/css/index.css
+++ b/css/index.css
@@ -71,6 +71,7 @@ pre,
 code {
   font-family: Consolas, Menlo, Monaco, "Andale Mono WT", "Andale Mono", "Lucida Console", "Lucida Sans Typewriter", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", "Liberation Mono", "Nimbus Mono L", "Courier New", Courier, monospace;
   line-height: 1.5;
+  background-color: #C0C0C0;
 }
 pre {
   font-size: 14px;