Hello,

First you need to adjust the Groupy Setting at Click 3 dot menu -> setting -> Visual -> Colors (button) un-check Automatically match color of custom titlebars.

Adjust these colors

Pick Default Active tab color : I set it to : Red 00 Green 00 Blue 00

Pick Default active tab color non focused color : Red 50 Green 50 Blue 50

Pick Default inactive tab color : Red 30 Green 30 Blue 30

Pick Default inactive tab color : Red 50 Green 50 Blue 50

You can adjust the color to your liking

Here what I get from the color I set above. And that color should stay on Maximize windows too.

Hey. Glad it solved it. Have a good one