Originally Posted by JustDressageIt
Grey. Might start out some funky color (I know next to nothing about color genetics) but the end result would be grey.
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Not entirely true. It depends if the grey is homozygous or heterozygous. Homozygous and you have 100% chance of the foal turning grey. Heterozygous and you have a 50% chance of the foal turning grey.