Will your baby have mom’s deep brown eyes or dad’s sparkling blue ones? While genetics can be complex, our Baby Eye Color Calculator uses a standard scientific model to predict the probability of your baby’s eye color. Simply select the eye color of both parents below to see the genetic possibilities instantly.
Baby Eye Color Calculator
Predict your baby’s eye color based on genetics
How Eye Color Genetics Work
Eye color is determined by the amount of melanin (pigment) in the iris. While multiple genes are involved, scientists generally focus on two main genes located on chromosome 15: OCA2 and HERC2.
Our calculator uses a simplified "two-gene model" to estimate probabilities:
- Brown is Dominant: The gene for brown eyes is generally dominant over both green and blue.
- Green is Dominant over Blue: Green is recessive to brown but dominant over blue.
- Blue is Recessive: To have blue eyes, a person typically needs to inherit blue-eye genes from both parents.
Can Two Brown-Eyed Parents Have a Blue-Eyed Baby?
Yes! It is rare, but possible. If both brown-eyed parents carry a recessive blue-eye gene (hidden in their DNA), there is roughly a 6.25% chance their baby will have blue eyes. This is why eye color can sometimes "skip a generation."
When Do Baby's Eyes Change Color?
Most Caucasian babies are born with blue or gray eyes because their melanocytes (pigment cells) haven't started working fully yet. Darker skin tones often result in babies born with brown eyes.
- 6 to 9 Months: The greatest color changes usually happen during this window.
- By Age 3: Most children will have their permanent eye color, though subtle changes can continue into adulthood.