What happened with the highlighting?

[oleedd]

There are many lines with tabset_control. What line number do I need?

[OdatNurd]

Making a tweak to a theme is not an insignificant thing if you’re unfamiliar with the process of how to do it. I can’t provide any guidance in that area save for referring to the documentation linked above and doing some trial and error until you hit the one that you want.

Possibly someone more into theming in Sublime in general can provide some assistance.