Most Likely Eye Color
Both parents have brown eyes
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Evidence-based calculations Used in clinical settings worldwide Regular monitoring recommended
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🟤 Both Parents Brown
Both parents have brown eyes
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🟤🔵 Brown + Blue
One parent brown, one parent blue
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🔵🔵 Both Parents Blue
Both parents have blue eyes
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🟢🟠 Green + Hazel
Mixed green and hazel parents
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🌍 Mixed Ethnicity
Parents of different ethnic backgrounds
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👨👩👧 Full Family History
Brown parents with blue-eyed grandparents
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🟢🔵 Green + Blue
Green and blue combination
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Sample Scenarios
🟤 Both Parents Brown
Both parents have brown eyes
🟤🔵 Brown + Blue
One parent brown, one parent blue
🔵🔵 Both Parents Blue
Both parents have blue eyes
🟢🟠 Green + Hazel
Mixed green and hazel parents
🌍 Mixed Ethnicity
Parents of different ethnic backgrounds
👨👩👧 Full Family History
Brown parents with blue-eyed grandparents
🟢🔵 Green + Blue
Green and blue combination
Parents' Eye Colors
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
— WHO
— CDC
How Eye Color is Inherited
Eye color is a polygenic trait, meaning multiple genes influence the final outcome. The primary genes involved are OCA2 and HERC2 on chromosome 15, but at least 16 genes can affect eye color. This calculator uses a simplified Mendelian model enhanced with grandparent data to estimate probabilities.
Brown
Most dominant
High melanin concentration
79% of world population
Hazel
Mix of brown/green
Moderate melanin + scattering
~5% of world population
Green
Rarest color (~2%)
Low melanin + lipochrome
Most common in Ireland/Scotland
Blue
Recessive
Rayleigh scattering (no blue pigment)
~8% of world population
Amber
Golden/copper
Lipochrome pigment dominant
~5% of world population
Gray
Very low melanin
More collagen in stroma
~1% of world population
Genes Involved in Eye Color
| Gene | Chromosome | Role |
|---|---|---|
| OCA2 | 15 | Main pigment gene, determines brown/blue |
| HERC2 | 15 | Controls OCA2 expression |
| SLC24A4 | 14 | Contributes to blue/green variation |
| TYR | 11 | Tyrosinase - melanin production |
| IRF4 | 6 | Associated with blue eyes |
| SLC45A2 | 5 | Light coloration gene |
When Does Baby Eye Color Change?
Most babies born with blue/gray eyes
Melanin production increases
Color usually stabilizes
Final color confirmed
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