1) It was originally used exclusively of horses and is thought to be ‘apple-gray’, perhaps with reference to dark, roundish spots on a gray background.
1400 unum equum album sive dappeldgray, Ripon
1564 2 fylles a dappell graye and a sowre baye,/i>, Marske
1577 my stoned horse daple gray, Easby
1631 sould one daple gray maire, Adwalton.