Frame off restored car so way to tell what the color originally was, that's why I am trying to decode this. Currently the car is a metallic blue-gray gray something like Castle Grey.
Every book I find says the first digit is the top followed by a 2 digit paint code, sounds simple.
So 4 is a blue convertible top, B is castle Grey, X is Sylvan Grey (what's 145 refer to??) with a an Ivory and Black interior. That doesn't seem like a very plausible combination.
Mike