1 files changed, 14 insertions, 0 deletions
diff --git a/lib/gitlab/theme.rb b/lib/gitlab/theme.rb
index b7c50cb734d..a7c83a880f6 100644
--- a/lib/gitlab/theme.rb
+++ b/lib/gitlab/theme.rb
@@ -19,5 +19,19 @@ module Gitlab
 
       return themes[id]
     end
+
+    def self.type_css_class_by_id(id)
+      types = {
+        BASIC  => 'light_theme',
+        MARS   => 'dark_theme',
+        MODERN => 'dark_theme',
+        GRAY   => 'dark_theme',
+        COLOR  => 'dark_theme'
+      }
+
+      id ||= Gitlab.config.gitlab.default_theme
+
+      types[id]
+    end
   end
 end