Horse Color Calculator
Estimate possible foal coat colors from the sire and dam’s Extension, Agouti, Gray, and Cream genotypes using simple Mendelian inheritance.
Enter parent genotypes
Estimated results
Select the sire and dam genotypes to estimate possible foal colors.
Extension controls red vs black
A foal with ee is chestnut-based. At least one dominant E allows black pigment to appear.
Agouti affects black pigment
On an E-based horse, dominant A usually restricts black pigment to the points, producing bay rather than black.
Gray masks the base color
A foal inheriting a dominant gray allele will usually lighten progressively with age, regardless of its underlying base color.
Frequently asked questions
What do EE, Ee, and ee mean?
They are possible Extension genotypes. EE and Ee can produce black pigment, while ee produces a chestnut-based coat.
Why can two similarly colored horses produce a different-colored foal?
Parents may carry recessive alleles that are not visible in their own coat color. Genetic testing gives a more reliable input than appearance alone.
How is cream dilution handled?
One cream allele creates single-dilute colors such as palomino, buckskin, and smoky black. Two cream alleles create double-dilute colors such as cremello, perlino, and smoky cream.
Does gray count as the horse’s base color?
No. Gray progressively masks an underlying base color. The calculator labels gray outcomes while also showing the hidden base color in parentheses.
Results are estimates generated locally in your browser using standard formulas and general assumptions. They are for informational purposes only and may not reflect your specific circumstances. VisionVix accepts no liability for decisions based on this tool's output.
