So most of you know so many actually 'brown' horses are called bays, because they look like a bay horse, but have a mealy muzzle, lighter underbelly, ect. So they're actually brown.
So a Cremello can produce palomino foals from Chestnut mares, buckskin or palomino from bay/blacks.
But what about when bred to a mare that is 'bay', but actually brown? Then what happens? Usually people list what their studs can produce out of different color mares, but brown is never mentioned.