Obviously dark colors absorb heat and light colors reflect. Everything depends on insulation.
When we were building our current coach I didn't want black so we have dark brown on the upper color and lighter colors below (earthy golds, beige and cranberry). We are well insulated and have four 13,500 btu roof airs.
I usually never need all four. Three units are plenty. Our manufacturer designed the venting on their CAD system as not to have any hard bends in the ducting that would restrict air flow. So, 13,500 btu units will freeze you out and they are lower profile too.
With any coach, you have to watch electrical usage as 50 amp is 50 amp.
Safe travels,
MM.
