Visual Studio colors mess up

Check this question at StackOverflow:

Basically the person asking the questing figures out himself that there is a plug-in overriding the colour settings. My tip would be to check any plug-ins you have installed and see if they have any font or colour settings

Also found this link although I don't know if it's really related.

It looks like you might be running ReSharper and have "color identifiers" enabled. They are optimized for a white background, I've had the same problem.

To fix go to ReSharper Options: Code Inspection/Settings and disable Color identifiers.

I don't know the reason they switch on and off, but it's probably because other users in your team have them enabled in their ReSharper "settings layer" which you can manage under ReSharper/Manage Options.

I had the same issue and I just changed the Color Theme to Blue (Tools > Options > Environment > General > Visual Experience > Color Theme) clicked OK.. then change it back to DARK and all colors went back to normal.