I met a bloke whos father worked in the aircraft plant as a test pilot at yokohama, and asked why the interior of his zero was red. He said that although there was a colour code, they ended up painting some aircraft whatever they could just to stop corrosion. I didnt really believ him til i found a picture of a zero with a horrid lime green interior.
Don't always believ you're colour codes either, get som pictures. The cod for my hurricane has the spinner black, when it should be white, and the engine bay grey/green, when it should be aluminium.
Cheers