Perhaps this problem is a side-effect of a package control bug which disabled installed packages, including any custom theme you might have installed. I saw something similar a few weeks back and use the Soda theme.
Check the following:
1. "ignored_packages" in your user settings file. In the settings same file, "theme" refers to the theme you have installed.
2. If the "theme" you're using was installed through package control, and is now in the "ignored_packages" list, you'll see sublime mess up just like in the OP's bitmap
If the above is the case, just remove the theme package from "ignored_packages", save and restart sublime.
If this doesn't work, go back to the default Sublime theme simply by deleting the "theme" key.