What colour foal would you get if you bred a gray stallion and a black mare?

i got a cherry bay coat color

Gray is independent of base coat color. If the stallion is heterozygous for grey there is a 50% chance that the foal will be gray. If the stallion is homozygous for grey the foal will be gray. If the stallion has only one gray parent then he is heterozygous.

That being said, the base coat color of a gray/color of a non-gray foal can be partially

extrapolated from the parents/grandparents/great grandparents.