Update style.css

style.css

@@ -1,6 +1,6 @@
 /* --- Page background: Top header + mid repeating --- */
 html, body {
-  background-color: rgb(40,9,109) !important;
+  background-color: #312e81 !important;
   background-image: 
     url('https://huggingface.co/spaces/ESCP/RX12WorkshopTemplate/resolve/main/background_top.png'),
     url('https://huggingface.co/spaces/ESCP/RX12WorkshopTemplate/resolve/main/background_mid.png') !important;