One would think so, but I am thinking less and less that that is the case. Like I said Ray K tackled it on a video but he abandoned TMainMenu and constructed a menu in a different way. I don't want to go through all that just to change the color of the title bar. Maybe it can be done by creating a customized style but I haven't looked into that and there other pressing things that I should dive into first.
Confession, I am actually a C++Builder user (just migrated to 11.3). But because the vast majority of Rad Studio users are Delphi people, I posted on the Delphi forum to reach a larger crowd as I can always translate the code (if it is mostly UI stuff that is).