Figured it out 
Preferences > Fonts & Colors > Versioning > Git > Highlighting
Change colors associated with ‘Modified in Working Tree’ etc.
It would be helpful to have some explanatory text saying that those options change how the names of the files in tabs look.
I had no idea making those changes would work but tried it anyway.
Or showing the option to change the colors of the files in the tabs when someone right clicks on the file name in the tab.
Hello Bdg,
Sorry for the inconvenience. Thank you for letting us know that it works and we will definitely add some text or option to help with the color change in the next update.
Regards,
M.Y. Developers
In Nov 2012 in this thread, someone asked:
How can we change the color of the ‘filenames’ appeared on the Editor Window’s tabs, or in the Projects/Files Window?
I chose the BlackEye theme and the filenames’ are colored blue in default, making it very difficult to tell.
I didn’t see a solution in here and can’t seem to find a way to change those colors. The BlackEye theme is really the only one that works for me, but it’s hard when you can’t read the names of the files in the tabs. They start out white but then turn gray or black after you edit them. I’ve looked all through the Preferences and can’t find a way to change these colors but am probably just missing it. Can you please point me in the right direction?
Figured it out
Preferences > Fonts & Colors > Versioning > Git > Highlighting
Change colors associated with ‘Modified in Working Tree’ etc.
It would be helpful to have some explanatory text saying that those options change how the names of the files in tabs look.
I had no idea making those changes would work but tried it anyway.
Or showing the option to change the colors of the files in the tabs when someone right clicks on the file name in the tab.
Hello Bdg,
Sorry for the inconvenience. Thank you for letting us know that it works and we will definitely add some text or option to help with the color change in the next update.
Regards,
M.Y. Developers