Calculate baby eye color probability (brown, blue, green) based on parental and grandparental eye colors using genetic models.
Eye color is a polygenic trait primarily controlled by the OCA2 and HERC2 genes on chromosome 15. Brown is dominant over blue and green.
Use our interactive calculator below to input your family history and calculate the probabilities. (Enable JavaScript to run calculations dynamically).
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Yes. If both parents carry the recessive blue-eye gene (heterozygous), there is a 25% chance their baby will have blue eyes.
Melanin production is stimulated by light. Most babies are born with blue or grey eyes, and their permanent eye color settles between 9 months and 3 years of age.