The color style in XCODE 4.0 isn't working?

I already upgraded XCODE from V3.5 to 开发者_如何学编程4.0, but the color style isn't working now, the color of variable name and function name etc.

Try opening ~/Library/Preferences/com.apple.dt.Xcode.plist in Xcode. There are a number of color keys in there. Just search for "color". Maybe one of those somehow got munged? Alternatively, you can try deleting the com.apple.dt.Xcode.plist file. Xcode should recreate it when it starts up.