How to customize the titlebar?

[paper sparrow]

Is there a way to change the window titlebar colour without changing the whole Applications theme? I have copied Mint-Y-Sand and replaced every single color setting in gtk.css to find the correct entry but it still refuses to change the titlebar (see picture).

I assume the Applications theme is the correct setting to change this since using a dark theme here does change the colour.
I have also tried to use gtk inspector but it doesn't let me select the title bar, just elements inside the window. Am I missing something in gtk.css / cinnamon.css or should I be looking somewhere else?
Thanks

[quasi veldt]

used to be possible on mint 20.3 and earlier

but they got too damn "smart"

may try to install metacity (a window manager) and see if it can take the place of muffin but , you'll need a solid research on it

then u can d/l and slap metacity themes into it, just like the good ol' days

[paper sparrow]

That's a shame, but I won't bother installing a different manager. At least I was able to switch it to dark and keep everything else in the light theme. Turns out If you copy a light theme and add 'Dark' to the directory name it turns the titlebar dark (and maybe some other things but didn't notice yet). Not exactly the colour that I wanted but still a lot better
Thanks