Skip http cache for custom color scheme

Author: rossta

app/controllers/site_controller.rb

@@ -29,11 +29,15 @@ def process_rendition(rendition)
   # @param rendition [Sitepress::Rendition] Rendered representatio of current_resource
   #
   def post_render(rendition)
-    if current_path?(root_path) || stale?(rendition.source, last_modified: current_resource.asset.updated_at.utc, public: true)
+    if skip_http_cache? || stale?(rendition.source, last_modified: current_resource.asset.updated_at.utc, public: true)
       render body: rendition.output, content_type: rendition.mime_type
     end
   end
 
+  def skip_http_cache?
+    current_path?(root_path) || custom_color_scheme?
+  end
+
   def current_path?(path)
     request.path == path
   end