The color highlights depend on the color scheme (tmTheme) and the syntax file (tmLanguage). The default color scheme, Monokai, does a decent job of highlighting most things and the default LaTeX syntax is not half-bad.
Can you describe what the issue is? Or what improvements you would like to see?
(I'm working on a color scheme for people who use Sublime to write text rather than code, so I am interested -- but I don't understand what you're after exactly.)