1965 Dodge Dart GT Exterior Color

Hey, I was wondering if anyone can help me with this..

I just bought a 65 Dodge Dart GT a few days ago. I was told that the paint interior etc was factory. A couple of my friends have faced this claim with skepticism. I was wondering who could tell me how to find out what factory paint options were available for my car, or how to find out what paint my car was made in, etc.