Grey with a mottled pattern of darker grey markings(noun)
WordNet. Princeton University. 2010.
Use "dapple-grey" in a sentence
"On Sunday Erin got me riding Seth, the huge dapple-grey Warmblood gelding, in a firm but kind contact with lots of leg."
"I would I could tell you the moving story of our cart and cart-horses; the latter are dapple-grey, about sixteen hands, and of enormous substance; the former was a kind of red and green shandry-dan with a driving bench; plainly unfit to carry lumber or to face our road."
"The amazon Amalia rides in fact a magnificent dapple-grey horse, with glossy hair, which flatters like a parade horse ..."