Hello @RevealHM,
Please follow these steps to set the background color on the scroll
-
Add the custom Class(custom_header_bg) in the Header Bar

-
Add custom JS in the custom header JS
jQuery(document).ready(function( $ ){
var stickyOffset = $('.custom_header_bg').offset().top;
$(window).scroll(function(){
var sticky = $('.custom_header_bg'),
scroll = $(window).scrollTop();
if (scroll >= stickyOffset) sticky.addClass('on_scroll_bg');
if (scroll == stickyOffset) sticky.removeClass('on_scroll_bg');
});
});
-
Now add this custom CSS code under the custom Header CSS
.x-bar.x-bar-is-sticky.custom_header_bg.x-bar-fixed.on_scroll_bg {
background-color: rgba(83, 70, 70, 0.59);
}
-
Remove the background from the Header bar.

- Uncheck the Hide Initially
Please note that the code provided in the above thread serves as a guide only and is to help you in getting started so implementing it and maintaining the code will be out of our support scope and for further maintenance for new possible versions of the theme that may cause the customization to break, you will need to hire a developer or you subscribe to One where customization questions are answered.
Hope it helps.
Thanks