Modal window theme colors?

Is there a specific theme variable for the color of the modal window, specifically the bar at the top of the screen (it’s a different color than the app’s nav bar by default)?

I haven’t found one yet. It used to be the same as the background color but a few updates ago it now appears as white. Is there a plan to fix this?

Just checked and it stoped working with update v2.7.2

Bump. I’d like to figure this out too.