Update style.css

style.css

@@ -30,7 +30,8 @@ button[type=submit]:hover {
 /* Hide Streamlit Branding */
 #MainMenu {visibility: hidden;}
 footer {visibility: hidden;}
-header {visibility: hidden;}
+header {visibility: hidden;
+       background-color: green;}
 
 .mb-auto{
   background-color:green;