The color scheme is not really messed up, Resharper just added some colors, this is probably due to Code Inspections (for C #, in any case, I assume it looks like C ++). To disable this, go to: Resharper - Resharper Options... Code Inspection Settings and uncheck "Color Identifiers"

EDIT: The above was for C # and Resharper 8.2, for C ++ and Resharper 9 the setting is here:

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