Predict your baby's skin color range from both parents' skin tones using the skin color predictor. Pick both parents' tones on the Monk scale, press Calculate, and see the spread.
Your baby's likely tone
Pick both parents' skin tones, then press Calculate.
Uses the 10-tone Monk scale. Free and private: the math runs in your browser.
How the spread changes with the parents' tones. Close tones give a tight range; distant tones give a range in between.
Monk 2 + 2
Most likely 263% chance
Monk 2 + 5
Most likely 3 or 439% chance each
Monk 2 + 9
Most likely 5 or 647% chance each
Monk 5 + 5
Most likely 537% chance
Monk 5 + 8
Most likely 6 or 737% chance each
Monk 8 + 8
Most likely 849% chance
Bars show the chance of each Monk tone, 1 (left) to 10 (right). Same model as the calculator.
Baby skin color is inherited through many genes that control the type and amount of melanin, the pigment behind skin color. Unlike eye color there's no dominant tone: copies from both parents add up, and the range of human skin tones reflects adaptation to different levels of UV light around the world.
Skin tone is polygenic: genes such as MC1R, OCA2, SLC24A5 and SLC45A2 each nudge the type and amount of melanin up or down, so skin color forms a continuum rather than set categories. The Tech Interactive's Ask a Geneticist answer "Where do different skin colors come from?" by Jamie Conklin, November 2008, explains that several genes are involved.
On average a child's tone sits near the midpoint of the parents', because each parent passes half their copies.
Each parent passes a different combination of pigmentation alleles to every child, so brothers and sisters can land at different points, sometimes outside both parents. Sun exposure can also shift melanin levels over time.
Both parents' skin tones set the center of the prediction. Pick each tone on the Monk scale, and the predictor works out a likely range for the baby, with the highest odds at tones that match or fall between the two parents.
Grandparents' skin tones adjust the range by adding variation that can skip a generation. Grandparents with tones different from the parents widen the predicted range, and similar tones narrow it.
Heritage background refines the range with ancestry you choose, such as European, African, East Asian, or South Asian, to account for variation across populations. It is never guessed from a photo.
Ten tones from lightest to deepest, designed to represent every skin tone fairly. Pick the closest match for each parent in natural daylight.
Monk Skin Tone scale by Ellis Monk, released by Google. Colors are approximate on screen.
The predictor gives a chance for each Monk tone. Add up the tones in a band to get that band's odds.
Fair skin sits at the lightest end of the scale, with the least melanin, and appears when inherited variants keep melanin production low.
Light skin falls between fair and medium, and is a common outcome when one parent has a lighter tone and the other a medium one.
Medium skin sits in the middle of the scale with a moderate level of melanin, and is common in mixed families where a lighter and a darker tone blend.
Olive skin falls between medium and brown, with warm green or golden undertones, and is frequent in people with Mediterranean, Middle Eastern, Latin American, or South Asian heritage. The Monk scale measures depth, not undertone.
Brown skin has a moderate-to-high melanin level and appears often when parents carry a mix of medium and darker pigmentation.
Dark skin sits at the deepest end of the scale, with the most melanin, the pigment whose concentration sets how dark skin is.
Newborn skin darkens gradually over the first few months, starting lighter or redder than its eventual tone.
All babies, including those with a dark-skinned heritage, have lighter or redder skin at birth, as the American Academy of Pediatrics notes in "How Your Newborn Looks" (HealthyChildren.org, March 2021).
Pigment-making cells get to work and the tone starts to deepen, often first around the ears and fingertips.
Around six months the skin reaches a tone close to its long-term color, though subtle changes can continue after that.
How much skin darkens depends on genes, baseline pigmentation and light exposure, and sun and seasons keep shifting it a little, so a newborn photo never predicts the final tone exactly.
What genetic studies and real families show, and what it means for the spread above.
Study · 2017
Tone is strongly inherited but not through one or two switches. That's why the calculator adds up many small copies instead of using a two-gene square.
Researchers measured skin pigmentation in over 450 KhoeSan people in southern Africa. Heritability was about 95%, yet well-known pigmentation genes explained only a small share; most of it was spread across the rest of the genome.
Martin et al., Cell, 2017Study · 2008
A few genes have big effects and many have small ones. The calculator's equal-sized copies are a simplification of that.
A US National Institute of Justice study found that single variants in SLC45A2, SLC24A5 and ASIP accounted for 45.7% of the variation in skin pigmentation across people of diverse ancestry, rising to 49.6% with an interaction between two of them.
Brilliant, National Institute of Justice report, 2008Case study · twins
With parents of different tones, every child is a fresh draw. That's why the result is a spread, not a single tone.
Lucy and Maria Aylmer from Gloucester, UK, were born in 1997 to a white father and a half-Jamaican mother. Lucy has fair skin and red hair, Maria a darker complexion: each inherited a different mix of their parents' pigment genes.
WTVR (CNN), UK twins turn heads, 2015Reference · 2022
It's the scale this calculator, and our baby generator's skin-tone check, use to compare parents and children.
Developed by Harvard sociologist Ellis Monk and released by Google, the 10-tone scale was built to represent darker skin better than the older 6-type Fitzpatrick scale. In a survey of about 3,000 people in the US, many found it matched their skin as well as a 40-shade palette.
Google, Monk Skin Tone ScaleUpload a photo of each parent to see the faces behind the range. Our AI baby generator reads both parents' tones on the same Monk scale and checks every child stays in your range.
Baby AI Generator's polygenic skin tone model combines many genes, each with a small effect, to estimate a range of possible skin tones. A 2026 review by Bose et al. in Frontiers in Genetics, "The genetic architecture of human skin pigmentation: evolution and adaptation across global populations," found that skin pigmentation follows a complex polygenic structure combining a few large-effect loci, such as SLC24A5 and SLC45A2, with a multitude of small-effect variants. Baby AI Generator's multi-gene model accounts for the wide spectrum of human skin tones and explains why children of the same parents can have different complexions. The model's multi-gene methodology is supported by studies on human pigmentation genetics.
Genes such as MC1R, OCA2, SLC24A5, and SLC45A2 shape melanin production in human skin, and a 2025 review by Guermazi and Saliba in Biology, "The Genetics and Evolution of Human Pigmentation," names MC1R, SLC24A5, TYR, and OCA2 among the key pigmentation genes. The MC1R gene sets the balance between dark eumelanin and lighter pheomelanin. OCA2 affects total melanin levels, influencing both skin tone and eye color. SLC24A5 and SLC45A2 take part in the melanin synthesis pathways and contribute to skin color variation across populations. Together, the melanin genes shape the amount and type of melanin produced, which creates a wide spectrum of skin tones within families and across people.
Siblings can have different skin tones because each child inherits a different combination of skin tone alleles from the parents. Skin color is polygenic, involving multiple genes such as MC1R, OCA2, SLC24A5, and SLC45A2. Each sibling's mix of melanin genes influences skin tone differently. Siblings can show a range of skin tones, from lighter to darker shades, despite sharing the same biological parents. With parents of quite different tones, those mixes can differ a lot, so siblings, even twins, can land at different points on the scale.
Yes, a little. When both parents carry a mix of lighter and darker pigment copies, a child can by chance get more of one kind than either parent. It's more likely when parents have similar mid-range tones.
No, baby skin color can only be predicted as a range. Skin pigmentation is polygenic, with many genes controlling melanin production, type, and distribution. Each child inherits a different combination of alleles from the parents, which makes a precise prediction impossible. Genes such as MC1R, OCA2, SLC24A5, and SLC45A2 widen the range of potential outcomes. Genetic variability explains why siblings can have different skin tones despite sharing the same parents, and polygenic inheritance creates a spectrum of possibilities rather than one predetermined result.
A 1989 study by Holbrook et al. in Anatomy and Embryology found that melanocytes, the cells that produce melanin, appear in fetal skin between 40 and 50 days of gestation. Fetal melanocytes are present in the skin but stay largely inactive in pigment production until after birth. After birth, light exposure triggers more melanin production and gradually darkens the skin. The delayed pigment production explains why newborns look lighter at birth and develop their natural skin tone over the following weeks and months.
Newborn skin often looks lighter or redder at first and deepens over the first months. Sun and seasons keep shifting it a little throughout life.
Most likely somewhere between both parents' tones, near the middle. The calculator shows the full spread on the 10-tone Monk scale, with the chance of each tone.
A 10-tone scale developed by sociologist Ellis Monk and released by Google in 2022, designed to represent the full range of human skin tones, especially darker ones, better than older scales.
It's an additive teaching model with 9 equal-sized genes. Real skin tone involves dozens of genes with different-sized effects, plus sun and age. Treat the spread as a guide, not a prediction for one child.
The criteria for choosing a baby skin color predictor are listed below:
Baby AI Generator's skin color predictor gives a range and links to a visual result. Grandparent and heritage input are coming soon.
Yes, as a separate step. The predictor gives a likely range from the two tones you pick; the mixed-race baby generator then reads each parent's skin tone from their photo and checks every child against both, so each baby's tone stays within your range, give or take one step. A child outside it is redone once, or its credit comes back.
Now meet the baby behind the tone. Your first result is free
Try the baby generator