How to change colors used by ReSharper for highlighting fields, constants and other symbols

Go to the Tools | Options | Environment | Fonts and Colors dialog. Find all items in the list with the prefix ReSharper and configure attributes for them as you like.

Or disable the ReSharper color identifiers option: (Extensions) | ReSharper | Options | Code Inspection | Settings | Color identifiers.

Please note that since ReSharper 7 supports built-in Light and Dark color themes for Visual Studio 2012 and above.