Yes, but this is dependant upon how color blind you are and your medical examiner would be able to answer whether or not you are worthy of flight. The 14 CFR Part 67 regulations, state that a pilot must have "the ability to perceive those colors necessary for the safe performance of airman duties" for all medical certification classes. So in a basic sense I take it as this: If you can tell the difference between red & green, blue [Air] & brown/green [earth], you should be good; but I am not a certified medical examiner so I can not make that decision for you.