from Wikipedia
Colors confused with palomino[edit]
Left to right: two chestnuts with flaxen manes, a palomino, and a gray
Many non-palominos may also have a gold or tan coat and a light mane and tail.
Chestnut with flaxen mane and tail: Lighter chestnuts with a light cream mane and tail carry a flaxen gene, but not a cream dilution. For example, the Haflinger breed has many light chestnuts with flaxen that may superficially resemble dark palomino, but there is no cream gene in the breed.
Cremellos carry two copies of the cream gene and have a light mane and tail but also a cream-colored hair coat, rosy pink skin and blue eyes.
The champagne gene is the most similar palomino mimic, as it creates a golden-colored coat on some horses, but golden champagnes have light skin with mottling, blue eyes at birth, and amber or hazel eyes in adulthood.[5]
Horses with a very dark brown coat but a flaxen mane and tail are sometimes called "chocolate palomino," and some palomino color registries accept horses of such color. However, this coloring is not genetically palomino. There are two primary ways the color is created. The best-known is a liver chestnut with a flaxen mane and tail. The genetics that create light flaxen manes and tails on otherwise chestnut horses are not yet fully understood, but they are not the same as the cream dilution. The other genetic mechanism is derived from the silver dapple gene, which lightens a black coat to dark brown, and affects the mane and tail even more strongly, diluting to cream or near-white.[6]
Buckskins have a golden body coat but a black mane and tail. Buckskin is also created by the action of a single cream gene, but on a bay coat.
Dun horses have a tan body with a darker mane and tail plus primitive markings such as a dorsal stripe down the spine and horizontal striping on the upper back of the forearm.
The pearl gene in a homozygous state creates a somewhat apricot-colored coat with pale skin. When crossed with a single cream gene, the resulting horse, often called a "pseudo-double-dilute", appears visually to be a cremello.
Color breed registries[edit]
Bottom line, without color testing knowing what color genetics the parents carried, all you then get is good guess work, the samE that CAUSED minimal marked anD roan Appaloosas, placed into the AQHA registry, in the beginning1
We have gone beyond that flawed visual sole method of color identification,
, same as any other genetic trait where one can test for!