Or else you can’t see them (confirm on the attached screen shot). I played with the theme editor a bit, did some tests but there is no obvious way to do it. How can I change it? .
You need to change the activeCaption color?
If yes, this is what you need to do with the ThemeBuilder. For the Close Button:
The other buttons are the same but the hovered color is different.
The big problem was fixing the “other” buttons. Believe or not, I had to define Active before Hovered to get everything working as it should.
I attach the result of my efforts.