Forgot to mention, palomino is a CREME gene from Chestnut. Rocky mountain horses can also be silver dapple, but that would never be considered palomino, yes a dilution it is but not palomino. Chocolate palomino is a Chestnut based horse who is cremed to palomino with a sooty gene. Complicated stuff is the world of color. ;) I know some, but just the tip of the iceberg......now don't ask me about Appies cause I've got NO clue!
Also Rocky Mountain people refer to their horses as "Chocoloate" but I am pretty sure they are just Silver Dapples genetically speaking.