Two pigments
Eumelanin makes black and brown shades; pheomelanin makes red and yellow tones. The balance between the two runs from jet black to platinum blonde.
Baby Hair Color Calculator: What Hair Color Will Your Baby Have?
Calculate your baby's hair color odds from the family's hair colors with the hair color calculator. Pick both parents' hair colors, tick any family history, press Calculate.
Your baby's chances
Pick both parents' hair colors, then press Calculate.
Tick family history if blonde or red hair runs in a parent's family.
- Free, no sign-upNothing to download
- Runs in your browserNothing is sent anywhere
- Family history countsBlonde or red in the family
- Then see the faceFirst baby result free
Baby Hair Color Chart: Common Parent Combinations
The textbook case: every brown- or blonde-haired parent carries hidden blonde and red copies. Without them, the odds shift toward the parents' own colors.
| Parents | Black | Blonde | Red |
|---|---|---|---|
| Brown + Brown | 56.25% | 18.75% | 25% |
| Brown + Blonde | 37.5% | 37.5% | 25% |
| Brown + Red | 25% | 25% | 50% |
| Blonde + Blonde | 0% | 75% | 25% |
| Blonde + Red | 0% | 50% | 50% |
| Red + Red | 0% | 0% | 100% |
Red includes auburn and strawberry blonde. The most likely color for each pair is highlighted.
How Is Baby Hair Color Inherited?
Baby hair color is inherited through several genes that set how much eumelanin and pheomelanin hair makes. Each parent passes on one copy of every gene, and the mix of alleles from both sets each child's hair color. For a mixed-race couple, the Mixed Race Baby Generator shows hair color and texture on whole faces, with each child's skin tone checked against both of yours.
MC1R, the red switch
MC1R is one of several genes that set the type and amount of melanin. Most people have two working copies and make mostly dark pigment; two non-working copies flip production to red.
Over a hundred regions
Shades of brown and blonde come from many genes adding small effects, and MedlinePlus Genetics notes in "Is hair color determined by genetics?" (National Library of Medicine, July 2022) that little is known about most of them. Melanin levels also change as children grow, so hair color can shift over time.
Baby Hair Color Probabilities
Black Baby Hair Probability
Black hair is the most likely result when at least one parent has black hair, because high eumelanin produces black or dark brown hair and dark-hair copies are dominant. That dominance makes dark hair more frequent than red and blonde. In the calculator, black and brown count together as dark hair.
Brown Baby Hair Probability
Brown hair is a common outcome in many families, because eumelanin, the pigment behind brown and black hair, is widespread. The calculator works out the dark hair percentage from the pigment copies each parent passes on, with brown and black counted together.
Blonde Baby Hair Probability
Blonde hair needs a light-hair copy from both parents, which keeps eumelanin low; the calculator finds those hidden copies from the family history you tick. Blonde often darkens during childhood as melanin production increases and fine baby hair is replaced by thicker strands.
Red Baby Hair Probability
Red hair appears when a child inherits two red variants of the MC1R gene, one from each parent. The Tech Interactive's Ask a Geneticist answer "What are my chances of having a red haired child?" by Marina Sumarroca, February 2020, explains that a child usually needs two matching red-hair alleles, or a different red-hair allele from each parent. MC1R works apart from the dark-or-blonde gene, so with dark-hair copies the red reads as auburn.
Does Baby Hair Color Change?
Often, yes. The color at birth is rarely the color for life.
Newborn
Many babies lose some of their first hair in the early months, and what grows back can be a different shade.
Toddler
Light, fine hair is common. Many blonde toddlers have parents with darker hair.
School age
Hair often starts to darken as pigment production picks up.
Teenage years
In people of European descent, blonde children often have darker hair by their teens, likely linked to hormones around puberty.
The Research Behind Baby Hair Color
What large genetic studies say, and what it means for the numbers above.
Study · 2018
Hair color is shaped by 124 genetic regions
Two genes can't capture everything. The calculator shows the main pattern; real shades of brown and blonde vary more.
A study of almost 300,000 people of European descent (UK Biobank and 23andMe) found 124 regions linked to hair color, more than 100 of them new. Together they explained about a quarter to a third of the heritability of red, blonde and black hair.
Hysi et al., Nature Genetics, 2018 (via King's College London)Study · 2019
MC1R predicts red hair almost on its own
The red percentage is the most reliable number here. Brown versus blonde is the rougher estimate.
Using about 400,000 UK Biobank participants, researchers found that 10 MC1R variants predicted red versus other hair with an accuracy score (AUROC) of 0.95. The same gene was poor at telling blonde from brown (0.55 to 0.68).
Zorina-Lichtenwalter et al., Human Molecular Genetics, 2019Reference · NIH
One red copy, two red copies
A parent with one hidden red copy can have a red-haired child, but only if the other parent passes one too: a 1 in 4 chance when both carry it.
MedlinePlus explains that a non-working MC1R copy lowers dark pigment: one affected copy can give strawberry blonde or auburn tones, and when both copies are affected, hair is almost always very red.
MedlinePlus Genetics, Is hair color determined by genetics?Case study · families
Brown-haired parents, a blonde or red baby
If a grandparent, aunt or uncle has blonde or red hair, tick it in the calculator. That's exactly what changes the odds.
Because blonde and red both need two copies from the parents, they can skip a generation: two brown-haired parents who each carry a hidden copy have a 1 in 4 chance of passing both.
Based on MedlinePlus Genetics and the recessive pattern of MC1R red hair
Want to See the Whole Face, Not Just the Hair?
Upload a photo of each parent and see four children with your hair, eyes and smile. Our AI baby maker adds a note on which traits came from whom, and your first result is free.
Baby Hair Color FAQ
How Does MC1R Cause Red Baby Hair?
MC1R variants shift pigment production toward red pheomelanin instead of dark eumelanin. Red hair requires two copies of MC1R variants in most cases, one inherited from each parent. People with only one variant copy have brown hair in many cases but can pass the red hair trait to their children. The "MC1R gene" page from MedlinePlus Genetics (National Library of Medicine, August 2018) explains that the melanocortin 1 receptor controls which type of melanin melanocytes produce. Recessive variants at the MC1R locus produce red hair when inherited from both parents.
Can Dark-Haired Parents Have a Blonde Baby?
Yes, dark-haired parents can have a blonde baby. Both parents may carry recessive light-hair alleles inherited from their own parents. When each parent passes a recessive blonde allele to the child, the child can express a lighter hair color. Hair color depends on multiple genes that control eumelanin and pheomelanin production, so two brunette parents who each carry one recessive blonde allele alongside a dominant brown allele can have a blonde child when both recessive variants combine. In this calculator, two parents with a hidden light copy give a 25% chance of two light copies; if both also carry red, that becomes 18.75% blonde and 25% red.
Can Brown-Haired Parents Have a Red-Haired Baby?
Yes, if both carry a hidden MC1R red copy: each child then has a 1 in 4 chance (25%). Red often skips generations for exactly this reason.
Do Two Red-Haired Parents Always Have a Red-Haired Baby?
Almost always. Red usually means two non-working MC1R copies, so both parents can only pass on red copies. The shade can still range from strawberry to deep auburn.
What Is Auburn Baby Hair?
Red mixed with dark pigment. In the model it happens when a child gets two red copies of MC1R and at least one dark copy of the pigment-amount gene.
Why Does Baby Hair Color Change After Birth?
Baby hair color changes after birth because fine newborn hair is replaced with mature hair and pigment levels shift. Newborns are born with soft, fine hair that differs in structure from mature hair. As the child grows, the first hair is replaced and melanin levels in the hair follicles change, which can lighten or darken the hair during the first years of life. Most children's hair color stabilizes between ages three and five, although some children see gradual changes into adolescence. A February 2025 Ask a Geneticist answer from The Tech Interactive, "Can we predict hair color in babies?" by Chloe Rome, confirms that babies born with light hair can see it darken as they age.
Does Newborn Hair Fall Out Before the Final Color?
Yes, many newborns shed hair in the first months. Falling hormone levels after birth push hair into a resting phase, known as telogen effluvium. The first hair may fall out, and regrowth can come in a different shade. Altered melanin production in the new hair can make it noticeably lighter or darker than the birth hair. The American Academy of Pediatrics notes in "How Your Newborn Looks" (HealthyChildren.org, March 2021) that most baby hair falls out during the first six months and that the mature hair's color and texture may differ from the hair the baby was born with.
How Reliable Is a Baby Hair Color Calculator?
A baby hair color calculator is reliable as a probability estimate based on a simplified genetic model, not as a definitive prediction. The calculator estimates the likelihood of each hair color from the reported hair colors of family members. Actual hair color involves many genes interacting in layered ways, which makes precise predictions impossible. Calculator reliability drops when grandparent information is missing, because grandparents may carry recessive pigment variants that never show in the parents' hair color. Even advanced DNA-based prediction models show variable accuracy across hair color categories, populations, and age-related changes, so calculator results are probabilities rather than guarantees. In this calculator the red estimate is the most reliable, because one gene, MC1R, drives it; brown versus blonde depends on many genes, so treat those numbers as a guide.
How to Choose a Baby Hair Color Calculator?
The criteria for choosing a baby hair color calculator are listed below:
- Allele Model: The calculator should use an allele model rather than a simple color-matching chart, tracking the eumelanin and pheomelanin pigment genes each parent contributes.
- Red Hair Handling: The calculator should account for MC1R variants, which predict red hair and need recessive alleles that standard dominance charts overlook.
- Grandparent Input: Grandparents' hair colors help detect hidden recessive alleles that parents carry but do not express.
- Visual Result: The calculator should link its odds to a visual result, such as the predicted hair color on an AI-generated baby face.
Can Baby Hair Color Appear on an AI Future Baby Portrait?
Yes, the hair color result can appear on an AI future baby portrait. Baby AI Generator places the predicted hair color directly on a photorealistic baby face, so parents see their child's most probable hair shade. Our calculator outputs probabilities for black, brown, blonde, or red hair, and Baby AI Generator applies the result to the baby's facial features synthesized from parental photos. Baby AI Generator connects the calculator and the AI portrait in one flow, from selecting family hair colors to viewing the result on an AI-generated baby portrait.
Now meet the baby under the hair. Your first result is free
Try the baby generator