When a horse has a cream dilution gene, the color of the coat will depend on what the base color is and whether it has one or two cream genes.
A chestnut horse with one cream gene will be palamino, but one with both cream genes will be cremello. A black horse will be either smoky black if it has one cream gene, or smoky cream if it has both. The buckskin and perlino coat colors come from a bay base coat with the cream dilution gene; the former has one cream gene and the latter has both.