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Originally Posted by Sightseek
A little on color:
Different color horses that have won the Derby.
Bay - 47
Chestnut - 43
Dark Bay/Brown - 8 Gray - 5
Black - 4
Roan - 2
Gray/Roan - 2
Winning Colors (1988) is the only roan to win the Derby.
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Genetically WC is grey. The roan gene doesn't exist in the breed. If they lighten w/age, they are grey and she's white now.
"Grey" in a horse is a progressive "conditition" effecting color. Roan is permanent. What does exist in the TB is rabicano which (similar to roan, but different genetically) is a sprinkling of white hairs over the primary body coat. In a rabicano, like a roan the white does not progress and become more prominent.