What do you call a chestnut horse with a flaxen mane and tail? If it’s a brown horse with a blond or dirty-blond looking mane, then it is referred to as a flaxen chestnut. Sometimes, especially in stock horse breeds, this color may be referred to as sorrel. Chestnut horses with flaxen manes and tails and various leg or face markings (such as socks, blazes, snips, stars, & stockings) are commonly found. Chestnut with flaxen mane and tail horses are not particularly unusual, and their genetic code is just the same as a typical chestnut horse.