Color tint top gnome top bar?

Hi Folks. Using Gnome 42 extensions (In Fedora 35) is it possible to color tint the top bar? If so which extension would do that? I colour tinted my “floating dock” so want to tint the top bar to match.

I thought Gnome was meant to be easy to apply themes to, if you knew your CSS coding.

You know, the same CSS that you use with HTML to design web pages. But all people talk about is finding the right extension. Not that extensions are bad.

But it should be easier than that. Sorry not using Gnome right now, or i could be more helpful.