Cannot Get QTTabbar Tab Font to Change Color

I don't know if I'm in the correct area because this site is extremely difficult to navigate through. I've been using the old version (1038) for many years because of this problem and decided to try the latest one (1043) because I saw that it has been updated. Unfortunately, the problem still remains.

How do I get the tab font color to change? 

I'm using Windows 10.


