Baby Eye Color Predictor
The Baby Eye Color Predictor estimates the chance your baby will have brown, green/hazel, or blue eyes based on both parents' eye colors. Pick each parent's eye color and it returns the most likely outcome plus rough probabilities for each color. It's a fun, simplified guide — real eye color is shaped by many genes, so treat the numbers as estimates.
Formula
Simplified probabilities from parents' eye colors (brown tends to dominate).
- The estimate uses simplified inheritance where brown tends to dominate over green, which tends to dominate over blue.
- Each combination of parent eye colors maps to approximate probabilities for a brown-, green/hazel-, or blue-eyed child.
- Input definitions: • Parent 1 eye color: the first parent's eye color. • Parent 2 eye color: the second parent's eye color.
- Real eye color is polygenic — genes such as OCA2, HERC2, and others all contribute — so outcomes can surprise you.
- Even two blue-eyed parents can rarely have a child with darker eyes, which is why no probability is exactly 0 or 100.
- Baby eye color often isn't settled until 9–12 months and can keep changing up to about age 3.
Example Calculation
Inputs
- Parent 1 eye color: brown
- Parent 2 eye color: blue
With one brown-eyed parent and one blue-eyed parent, the most likely outcome is brown eyes at about 50%, with roughly 38% blue and 12% green/hazel. Brown's tendency to dominate tips the odds toward brown.
Frequently asked questions
How is baby eye color predicted?
From both parents' eye colors, using a simplified model where brown tends to dominate green, and green tends to dominate blue.
Can two blue-eyed parents have a brown-eyed baby?
It's rare but possible. Because eye color depends on several genes, a recessive variant can occasionally produce a darker shade.
When does eye color become permanent?
Eye color is usually settled by 9–12 months but can keep shifting until around age 3 as melanin develops in the iris.
Why aren't the probabilities exact?
Eye color is polygenic, so a simple parent-to-child model can only estimate. The percentages are approximate, not guarantees.
What determines eye color?
The amount and arrangement of melanin in the iris, driven mainly by the OCA2 and HERC2 genes along with several others.
Is this prediction medically reliable?
No — it's a for-fun estimate. It shouldn't be used for anything beyond curiosity about your baby's likely eye color.
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