Sorrel is a reddish coat color in a horse lacking any black. It is one of the most common coat colors in horses, and usually refers to a light, coppery shade. It may be treated as distinct from the chestnut, in which case the latter refers to a browner shade. The term "sorrel" probably comes from the color of the flower spike of the sorrel herb.
A chestnut horse
|Other names||Red, sorrel|
|Variants||Flaxen, Liver chestnut|
|Base color||Recessive extension "e"|
|Description||Reddish-brown color uniform over entire body other than markings|
|Head and Legs||Same as body, occasionally lighter|
|Mane and tail||Flaxen to brown|
|Skin||Usually black, may be lighter at birth in some breeds|
|Eyes||Brown, eyes may be lighter at birth|
In practice, however, some argue that "sorrel" should be used to describe only lighter shades, or shades with a very clear reddish tint, while "chestnut" denotes darker shades or shades with more brown in them. Up until recently "sorrel" was used solely in place of "chestnut" in the United States to refer to any reddish horse with a same-color or lighter mane and tail, ranging from reddish-gold to a deep burgundy or chocolate shade but lacking the brownish tint of the chestnut. "Chestnut" is more often used to include the lighter color in England and on the east coast of the United States, while the term "sorrel" is more common in the western United States.
The practical difference is most often not in color, but in usage: horses ridden in the Western tradition are more often referred to as sorrel and horses ridden in the English tradition are chestnut. The American Quarter Horse Association, which uses both terms, describes a sorrel as a type of copper-red chestnut, but allows that chestnut is also a correct term. Many organizations simply avoid the issue and choose one of the two terms to denote all reddish or brown colorations that are not bay.
Sorrel or chestnut coloration can be distinguished from dun, which results from different genetics, by the dun's slightly washed-out yellowish color, with a darker mane and tail than the rest of its coat, a narrow, dark line down the middle of the back, and possibly areas of darker color on the shoulder and forelegs.
The base shade of a sorrel is similar to that of a blood bay, but sorrel can always be distinguished from bay by the bay's black "points" — a black mane, tail and lower legs.
Light-colored sorrels, sometimes called "blond sorrels," especially if they have flaxen manes and tails, may resemble a palomino. However, true palomino coloration is the result of a horse's being heterozygous for the cream dilution gene.
Some definitions list sorrel as a self color, used to describe only horses whose mane, tail, and legs are the same color as the rest of the coat, with the exception of white markings. Other definitions are broader and include reddish-brown horses with flaxen manes and tails.
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