Is that true?
I see so many teak
caves, but not as many as I used to. Boats have lighter interiors than they used to in general. I think white or creme is a color that is the least objectionable therefore it appeals to a larger market than if you were making all your boat interiors red for example.
Also, your eyes don't have to adjust as much when going below deck
into a lighter interior
. Your room lights are also more effective when much of the light is not absorbed by a mostly dark interior.
I also think many people are kinda traditional with boats and do not like seeing a bunch of bright colors on them. Interior upholstery might be a little different for many though. A few splotches of bright colors looks decent I think.
Nobody says you can't paint
the inside of your boat whatever color you wish.