That was his name. In 1930 he was "the biggest horse ever."
Brooklyn "Brookie" Supreme (April 12, 1928 – September 6, 1948) was a red roan Belgian stallion noted for his extreme size. Although disputed, the horse may be the world record holder for largest (but not tallest) horse and was designated the world's heaviest horse. He stood 19.2 hands (198 cm (6 ft 6 in)) tall and weighed 3,200 lb (1,451 kg) with a girth of 10 ft 2 in (3.10 m). His horseshoes required 30 in (76 cm) of iron. The horse was foaled on the Minneapolis, Minnesota farm of Earle Brown.
Reposted from 2018 to add some additional material, including this photo of a Percheron stallion -
This Percheron exhibiting color change over a 5-year time span:
This is not specific to Percherons. Horses with the grey gene are born with whatever their coat pattern/color would have been without the grey gene. The grey gene then causes depigmentation of that color over time. It's a short period of time and usually you can see that a horse is carrying the grey gene when they are foals (many foals will present grey "goggles").
And this photo of a horse exhibiting seasonal color change: