Baby eye color calculator
Pick each parent's eye color — and a grandparent's, if you know it — and we'll estimate the odds your baby ends up with brown, green or blue eyes.
Mom's eye color
Dad's eye color
How the eye color prediction works
Eye color comes down to how much melanin sits in the front of the iris. More melanin means brown; a little means green or hazel; almost none looks blue or grey. Two genes do most of the deciding, and the brown version tends to win when it is present — which is why brown is the most common eye color in the world.
Because the blue gene is recessive, it can hide for a generation. That is why the calculator asks about grandparents: if a brown-eyed parent had a blue-eyed mother or father, that parent almost certainly carries the blue gene and can pass it on. Ticking that box shifts the odds toward lighter eyes.
When does baby eye color change?
Newborns often start with dark blue or slate-grey eyes. Over the first six to nine months the iris builds melanin and the real color emerges. Brown usually locks in earliest; green and hazel are the slowest and can keep shifting until your baby's first birthday, sometimes a little beyond.
Eye color progression, month by month
If you want to track it, take a photo in the same soft, indirect light every month. You will often see blue-grey at birth, a hint of the final shade around three to four months, and a settled color by nine to twelve months. Babies heading for brown eyes tend to show flecks of gold or brown near the pupil first.
Baby eye color chart, pairing by pairing
These are the figures this calculator returns, not a survey of real families. They come from the two-gene model described above, where brown outranks green and green outranks blue, and they are rounded so each row lands on 100.
| Parents | Brown | Green / hazel | Blue / grey |
|---|---|---|---|
| Brown + brown | 89% | 8% | 3% |
| Brown + green | 67% | 29% | 4% |
| Brown + blue | 66% | 17% | 17% |
| Green + green | 0% | 94% | 6% |
| Green + blue | 0% | 75% | 25% |
| Blue + blue | 0% | 0% | 100% |
Two brown-eyed parents are the row people check most often, and it is also the row that moves the most once you know a bit more about the grandparents. Without that extra information the model has to spread the odds across every brown genotype it considers possible.
What one blue-eyed grandparent does to the odds
Ticking the grandparent box tells the calculator that a brown-eyed parent is carrying blue. The effect is not subtle. A brown-eyed and a blue-eyed parent start at 66% brown, 17% green, 17% blue. Mark the brown side as a carrier and it becomes an even 50-50 split between brown and blue. Two brown-eyed parents who both carry blue go from 89% brown to 75%, with blue rising from 3% to 25%.
Green disappears from those two carrier rows, and that is worth explaining rather than hiding: the box says blue specifically, so the model drops the brown-and-green combinations from the pool. It is a side effect of a simplified system, not a claim that a carrier couple cannot have a green-eyed child.
Where the chart stops being useful
Blue plus blue reads as 100% blue here. In the real world it is close to that, but not absolute, and a chart that says otherwise is overselling a two-gene model. Eye color is polygenic: OCA2 and HERC2 explain most of the brown-to-blue range, while other genes and the way melanin is deposited in the iris fill in the rest. A rare combination can produce a green-eyed or even brown-eyed child from two blue-eyed parents. MedlinePlus covers the inheritance pattern and the role of OCA2 in more detail.
The other limit is timing. A number here describes the color your child settles into, not the one you see in the hospital. If you want the face rather than the odds, our photo tool blends two parent pictures so you can see what your baby might look like while you wait for the real answer.
When one eye is a different color from the other
Different-colored irises, or a ring of one color inside another, is called heterochromia, and a calculator built on three broad categories has nothing to say about it. The American Academy of Ophthalmology notes that most children born with it have no other eye or health problems, though a small number of cases sit alongside a condition worth identifying early. If you notice it in your own baby, mention it at the next check-up rather than reading percentages. The AAO explains the types and causes.
What is the rarest eye color?
There is no single percentage that answers this for every population. A study of U.S. driver-license records reported green eyes in about 9% and grey eyes in less than 1% of its dataset. Those are U.S., self-reported figures, not a worldwide survey or a study of newborns. In that dataset, grey was less common than green. The result should not be turned into a universal ranking of every eye color. Read the U.S. iris-color study and its limitations.
Where do amber and grey fit?
Comparisons depend on the categories a study records. The U.S. study reports grey separately but does not provide a separate amber estimate in its overall distribution. It therefore cannot establish an amber percentage or an amber-versus-grey ranking. Before comparing two online figures, check whether they describe the same country, age group and color categories. A missing category is not evidence that nobody has that eye color.
Does rarity predict my baby's eye color?
No. A population frequency is not an individual baby's probability. Eye color involves several genes and the amount of melanin in the iris; inheritance is more complex than a single brown-versus-blue rule. This calculator groups colors into broad categories and offers a simplified illustration, not a genetic test or a medical prediction. Its rounded percentages should not be interpreted as clinical precision. MedlinePlus explains eye-color inheritance.
Continue a baby shortlist
Eye color cannot choose a name, but the same families using this calculator often have a shortlist in progress. Compare the full rhythm in the middle name generator, or check the latest recorded choices in top baby names for 2026.
Common questions
How accurate is a baby eye color calculator?+
It gives a genetics-based estimate, not a certainty. Eye color is controlled by several genes, but two of them, mainly OCA2 and HERC2, do most of the work, so a parent-based prediction lands close most of the time. Adding a grandparent's eye color makes it sharper because it reveals hidden recessive genes.
When does a baby's eye color change?+
Most babies are born with dark blue or grey eyes because the iris has not finished making melanin. Real color usually appears between 6 and 9 months and can keep deepening until about 12 months — occasionally up to age three.
Can two blue-eyed parents have a brown-eyed baby?+
It is rare but possible, because more than one gene is involved. This calculator runs on a simplified two-gene model, so it shows two blue-eyed parents as 100% blue. Read that as the model being blunt rather than as a guarantee.
What is eye color progression?+
It is the gradual shift from a newborn's blue-grey eyes to their final color as melanin builds up. Brown eyes usually settle first; green and hazel take the longest and change the most month to month.