Baby eye color chart by parents, and with grandparents
The chart shows the odds for each parent combination on its own. Grandparents can shift these numbers a lot, so for odds with grandparents, enter their eye colors in the calculator above.
| Parents | Brown / amber | Hazel | Green | Blue / gray |
|---|
| brown + brown | 63% | 23% | 3% | 12% |
| brown + hazel | 60% | 26% | 4% | 10% |
| brown + green | 39% | 23% | 22% | 16% |
| brown + blue | 47% | 15% | 4% | 34% |
| hazel + green | 37% | 25% | 24% | 14% |
| hazel + blue | 45% | 17% | 9% | 29% |
| green + green | 1% | 0% | 77% | 22% |
| green + blue | 1% | 0% | 52% | 46% |
| blue + blue | 1% | 0% | 0% | 98% |
Parents only, no grandparents entered. Rounded, so rows may not add to exactly 100.
Eyes are only part of the picture. The baby hair color calculator uses the same kind of family model for hair, red hair included.
The genetics behind the numbers
Most of the difference between brown and blue eyes comes from one region on chromosome 15. A single variant in the HERC2 gene turns down OCA2, the gene that makes brown pigment in the iris; almost everyone with blue eyes carries two copies of it. Green and hazel come from intermediate pigment levels shaped by further genes. The classic two-gene model captures this well enough to give useful odds, and grandparents reveal the hidden variants a brown-eyed parent may carry.
How the numbers are calculated
- Allele frequencies are set so that random couples reproduce the US eye color mix: brown 45%, blue 27%, hazel 18%, green 9%.
- Each parent's hidden genes are inferred from their eye color and, if entered, their parents' eye colors, using Bayes' rule.
- Hazel is modeled as a brown-green mix; how often it appears with or without a green variant is our own estimate.
- A 1% allowance covers genes and misreported colors the two-gene model doesn't capture.
- Some people call this an eye colour calculator or an eye colour genetics chart. It is the same model and the same odds, whichever spelling you use.
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Try the AI baby generator for couples →Questions parents ask
How accurate is a baby eye color calculator?
It gives odds, not a guarantee. Eye color is shaped mainly by the HERC2/OCA2 region plus several other genes, so a two-gene model is a useful approximation. Two brown-eyed parents can still have a blue-eyed baby if both carry the blue variant.
Why does adding grandparents help?
A brown-eyed parent may carry a hidden blue or green variant. If that parent’s own mother or father had blue eyes, the hidden variant is much more likely, and the calculator shifts the odds toward lighter eyes.
Can I use it if I don’t know the grandparents’ eye colors?
Yes. Grandparents are optional, and each one can be left as “Don’t know”. The calculator then uses population odds for that person’s hidden genes, so the result is the same as entering parents only. Every grandparent you do know makes the estimate sharper, even just one.
If both parents have the same eye color, will the baby have it too?
Usually, but not always. In this model two blue-eyed parents give about 98% blue, two green-eyed parents about 77% green with 22% blue, and two brown-eyed parents about 63% brown, 23% hazel and 12% blue. Brown and green can hide a blue variant, so parents with the same brown or green eyes can still have a lighter-eyed baby.
When do babies get their final eye color?
Many babies, especially with lighter skin, are born with blue or gray eyes. Melanin builds up over the first year, so eye color usually settles between 6 and 12 months and can keep changing slightly until about age 3.
Can two blue-eyed parents have a brown-eyed baby?
It is rare but possible, because more genes are involved than the classic model allows. This calculator keeps a small allowance for those cases, so two blue-eyed parents show about 1–2% non-blue.
Does a Punnett square give the same answer?
Not quite. A punnett square eye color calculator uses one gene, with brown dominant over blue, and assumes you already know which hidden variants each parent carries. This calculator uses two genes, one for brown versus blue and one for green versus blue, and works out the hidden variants from each parent’s eye color and the grandparents’. That is why it can give odds for green and hazel, which a single-gene Punnett square cannot.
Is this an eye color determination calculator or an eye color generator?
People search for both. As an eye color determination calculator, it works out the odds of each color from the parents’ and grandparents’ eyes. It is not an eye color generator in the sense of making a picture: it gives percentages, not a photo. To see a realistic face for your future child, use the AI baby generator for couples.
Why are gray and amber merged into blue and brown?
Genetically, gray eyes behave like blue and amber like light brown. Treating them that way keeps the model honest instead of inventing separate inheritance rules.
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