The interior colors were flat white overheads and bulkheads(walls) the idea was to improve the lighting, so the elevator sides would get the white paint too. All steel Decks were Deck Grey.
the flight deck was Fir wood which is orangish in color, but the Flight decks were stained a Mahogany Red color. IN 1941 there were experiments with Blues & Greys for the flight deck, so the time period you're modeling may need to be considered.
Flight deck round downs & markings were flat yellow.
Hope this helps,