diff --git a/app/controllers/seminars_controller.rb b/app/controllers/seminars_controller.rb
index 332446c..4813abf 100644
--- a/app/controllers/seminars_controller.rb
+++ b/app/controllers/seminars_controller.rb
@@ -215,7 +215,9 @@ class SeminarsController < ApplicationController
       end
       custom_datapp_data["300"] = [custom_banner]
     end
-    return {"main_content"=>main_content,
+    return {
+          "extra_body_class" => "seminar_custom_page background_style_#{background_style} content_style_#{content_style}",
+          "main_content"=>main_content,
           "extra_css"=>extra_css,
           "extra_js"=>extra_js,
           "header_data" => header_data,