diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 0ac757f6..e4843847 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1379,6 +1379,7 @@ Isabelle:
 
 J:
   type: programming
+  color: "#2d8abd"
   extensions:
   - .ijs
   tm_scope: source.j