Let me start by saying that I have NO IDEA what palomino and devonshire with tea-stained glaze looks like. If you said Fire Engine Red and Midnight Blue, I'd be able to help. With that I really can't help you with deciding what color you want to make the ceiling. Have you asked the folks at Home Depot (which is where I presume you bought the paint???) Talk to someone in the Paint Department or in the Interior Decorating Department. At worst, contact RL for some help (whose info should be on the can of paint ...)
As an aside, I just want to let you know that FLAT paint is really meant for imperfect/uneven surfaces where you don't want any light to reflect the 'character' of this type of wall. Also, since there is no gloss in FLAT paint, marks and stains and such have a HIGH probability of 'penetrating' the suface.
Semi-Gloss paints, on the other hand, are meant for flat/even surfaces because they DO reflect the character of the wall (which is OK because, ... well, the wall has no irregularities in this example.) PLUS, because of the gloss, there's a 'shield' (of sorts) that's formed when the paint hardens that makes it pretty easy to clean. Since the dirt/stain is more apt to stay on TOP of the gloss, it's not absorbed into the underlying paint (which would make it harder to clean as is with FLAT paint.) Semi-gloss paint is recommended in rooms like kitchens, play rooms, bedrooms, and hallways, especially when children are around. (Clean up is MUCH easier w/semi-gloss!)
Stick around - Others may be able to help. Again, at worst, ctc RL. My best to ya and hope this helps.
Jay J -Moderator
PS: God Bless America!