diff --git a/doc/reference.css b/doc/reference.css
index b1dd25d..04e38cf 100644
--- a/doc/reference.css
+++ b/doc/reference.css
@@ -2,6 +2,7 @@ body {
     margin-left: 1em; 
     margin-right: 1em; 
     font-family: "Verdana", sans-serif; 
+    background: #ffffff;
 }
 
 tt {