Genetic origin and mechanism
The Champagne variant is associated with SLC36A1 and acts on several base colors, so the final shade depends on whether the horse is chestnut, bay or black underneath.
Development and variations
Skin mottling develops progressively and eye color changes after birth. Coat shade may also vary seasonally.
Possible confusions
Depending on the base color, champagne may resemble palomino, buckskin, chocolate or pearl. Freckled skin and amber eyes are major clues.