I use custom color theme in Visual Studio. Black background and light-colored fonts. After installing new ReSharper nightly build I noticed however, that something is not right. ReSharper adds additional coloring to your syntax, but it seemed to be disabled. I checked ReSharper’s settings, and it looked OK. It turned out to be Visual Studio issue. Looks like it didn’t pick additional colors from ReSharper. To fix this you need to open Tools –> Options, then navigate to Environment–> Fonts and Colors, and wait for Visual Studio to reload its colors. You can close the window now. All should be back to normal.