you will be able to find the actual paint codes for various shades & gloss level of interior components that were originally painted, but I don't think there is any source for what color the vinyl or plastic pieces can be dyed to replicate their original molded/cast color.
with the hundreds of paint systems out there - your best option is trial & error matching (or scanning) the backside of an original piece
* unless someone recently matched the same interior with good results.
I am currently in search of a good paint match for the a-pillars, dash pads and/or kick panels (at least 2 different colors) for a '69 Road Runner with tan interior (M6T T7) - in every fresh tan interior pic on-line the colors are different & I don't have any original pieces.