Bay horses are black base, with at least one Agouti gene giving them a light colored body with black points on the legs and face, and a black mane and tail.
| Genetic Panel | ||||||
| Extension | Agouti | Grey | Cream/Pearl | Dun | Silver | Champagne |
| E/e or E/E | A/a or A/A | n/n | n/n | n/n | n/n | n/n |
| Shades | |
| Foal | |
 | |
| Standard Bay | Blood Bay |
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| Cherry Bay | Copper Bay |
 |  |
| Russet Bay | Dark Bay |
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Variants