Baby Eye Color Calculator
Predict your baby's eye color using genetic inheritance patterns and parental eye colors
Eye Color Genetics Calculator
👶 Baby's Eye Color Prediction
Most Likely Outcome
Your baby has a 75% chance of having brown eyes. There's genetic diversity possible in your baby's eye color.
Eye Color Probability Chart
| Parent Combination | Brown | Green | Blue |
|---|---|---|---|
| Brown × Brown | 75.0% | 18.8% | 6.3% |
| Brown × Green | 50.0% | 37.5% | 12.5% |
| Brown × Blue | 50.0% | 25.0% | 25.0% |
| Green × Green | 0.0% | 75.0% | 25.0% |
| Green × Blue | 0.0% | 50.0% | 50.0% |
| Blue × Blue | 0.0% | 0.0% | 100.0% |
* Highlighted row shows your current parent combination (heterozygous assumption)
🧬 Genetic Model
Brown (R)
Dominant allele - most powerful
Green (G)
Intermediate dominance
Blue (B)
Recessive allele - least dominant
Dominance Order: Brown > Green > Blue
Each parent contributes one allele to determine baby's eye color
👁️ Eye Color Development
Birth: Many babies born with gray or blue eyes
3-6 months: Eye color begins to develop
1-2 years: Final eye color usually established
Light exposure: Helps melanin production
✨ Fun Facts
Brown is the most common eye color worldwide
Blue eyes are relatively rare globally
16+ genes influence eye color
Heterochromia creates different colored eyes
Understanding Baby Eye Color Genetics
How Eye Color Inheritance Works
Eye color is determined by multiple genes, but this calculator uses a simplified 3-allele Mendelian model with Brown (R), Green (G), and Blue (B) alleles. Brown is dominant over green and blue, while green is dominant over blue.
Genetic Combinations
- •RR, RG, RB: Brown eyes (dominant)
- •GG, GB: Green eyes (intermediate)
- •BB: Blue eyes (recessive)
Real-World Considerations
🧬 Complex Genetics
Actual eye color inheritance involves 16+ genes and is more complex than this simplified model.
⏰ Time Factor
Baby's eye color can change during the first 1-2 years as melanin develops.
🎯 Predictions
Results are probability estimates, not certainties. Multiple factors influence final eye color.
Common Questions
Can two brown-eyed parents have a blue-eyed baby?
Yes! If both parents carry recessive blue alleles (Rb), there's approximately a 6.25% chance their baby could have blue eyes.
Why might predictions be inaccurate?
This model simplifies complex genetics. Real eye color involves multiple genes, environmental factors, and genetic variations not captured in basic Mendelian inheritance.
When do babies get their final eye color?
Most babies develop their permanent eye color between 6 months to 2 years of age, as melanin production increases with light exposure.
⚠️ Important Genetic Disclaimer
This calculator uses a simplified 3-allele Mendelian genetic model for educational purposes. Real eye color inheritance is significantly more complex, involving 16+ genes and various environmental factors. Results represent probability estimates, not certainties. Eye color can continue changing during the first 1-2 years of life. For genetic counseling or concerns about inheritance patterns, consult qualified healthcare professionals or genetic counselors.