This question has come up before. I really thought Jeff Herne would know the answer. I can give you an educated guess, and basis for it.
I served on a modern LPH (in the early '80s that is). Our hanger walls (bulkheads) were Haze Gray, same as outer hull. Deck was Flight Deck Gray, and Ceiling was White. Based on that I plan on doing mine (I'm working on the Essex, and have the other 3 waiting in the wings) in the color of the hull cammo. If doing a complacated scheme use the "base color".
Unless anyone else knows a better answer.
Tim H.
"If your alone and you meet a Zero, run like hell. Your outnumbered" Capt Joe Foss, Guadalcanal 1942
Real Trucks have 18 wheels. Anything less is just a Toy!
I am in shape. Hey, Round is a shape!
Reality is a concept not yet proven.