diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index e528f812..cd345450 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -283,7 +283,7 @@ C#:
   type: programming
   ace_mode: csharp
   search_term: csharp
-  color: "#5a25a2"
+  color: "#178600"
   aliases:
   - csharp
   extensions: