diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index d8768015b..ddf7c45e0 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -908,7 +908,7 @@ CSS:
   ace_mode: css
   codemirror_mode: css
   codemirror_mime_type: text/css
-  color: "#563d7c"
+  color: "#663399"
   extensions:
   - ".css"
   language_id: 50