diff --git a/assets/css/mark.css b/assets/css/mark.css
index 119fc5c..38694d0 100644
--- a/assets/css/mark.css
+++ b/assets/css/mark.css
@@ -122,7 +122,7 @@ code {
 	color: #437b91;
 	border-radius: 2px;
 	white-space: pre;
-	background-color: #00110d;
+	background-color: #13110f;
 }
 
 /* syntax  */