How rare is your eye colour, really?
Ask ten people which eye colour is rarest and you'll get four different answers, most of them wrong. Rarity here is a local fact more than a global one. The colour that turns heads in Seoul is ordinary in Reykjavik, and the whole ranking flips depending on which crowd you're being measured against. Pick your colour and your region to see the real 1-in-X figure, at home and worldwide. This calculator on Find The Norm uses American Academy of Ophthalmology, World Population Review and published genetic study data to rank your eye colour rarity within your region and against the global population.
Querying population data…
And your blood type?
The same rarity question, asked about blood groups.
Eye colour prevalence, region by region
Brown is the world's default, carried by 55 to 79% of people depending on which survey you read, and in East Asia and Sub-Saharan Africa it is close to universal. Green sits at roughly 2% of everyone alive and grey at about 1%. Blue looks scarce on a world scale at 8 to 10%, then you land in Scandinavia and find countries where it reaches 85%. Read the regional columns below before the global one, because nobody has ever met a global population, and treat every figure in them as an estimate, since no census of eye colour exists. Eye colour prevalence data by region is compiled on the body statistics page alongside other physical trait distributions.
| Eye Colour | Global % | Northern Europe | East Asia | Sub-Saharan Africa |
|---|---|---|---|---|
| Brown | 70% | 25% | 95% | 98% |
| Blue | 9% | 50% | <1% | <1% |
| Hazel | 5% | 12% | 1% | 1% |
| Green | 2% | 9% | <1% | <1% |
| Grey | 1% | 3% | <1% | <1% |
| Amber | 5% | 1% | 3% | <1% |
What is the rarest eye colour in the world?
Grey is the rarest naturally occurring eye colour, found in roughly 1 to 3% of the world's population and concentrated in Scandinavian and Eastern European countries, with green second at about 2% worldwide and amber, the solid golden tone most people file under brown, at about 5%. Neither grey nor green has a pigment of its own. Both are the product of low melanin in the iris and Rayleigh scattering, the same physics that makes the sky look blue.
Swap the reference population and the ranking turns over. Green eyes show up in more than 20% of people in Ireland and Scotland, which makes them locally unexceptional while they stay globally scarce. Grey is a common sight in Iceland and the Baltic states. Blue runs at 8 to 10% worldwide and is the majority colour in Scandinavia, Ireland, Estonia and Finland. Brown's global share, somewhere between 55 and 79% depending on the estimate, is mostly a headcount of South Asia, East Asia, Sub-Saharan Africa and Latin America, where brown is near-universal, and there are Northern European populations in which brown-eyed people are the minority.
Heterochromia is the variation people actually stop and look at. Complete heterochromia, one iris a different colour from the other, affects fewer than 0.5% of people. Sectoral heterochromia, a wedge of another colour inside one iris, runs at roughly 1 to 2% and usually goes unseen at conversational distance. Central heterochromia, a ring of colour around the pupil, is commoner again, and it is what most people mean when they say their eyes are two colours. Each type comes down to melanin being laid down unevenly, generally from birth, occasionally after an injury or an illness.
Why are green eyes rare?
Green needs an intermediate amount of melanin in the iris, and the gene combinations that land in that narrow middle are much less common than the ones producing either end of the scale, which is why green comes in at roughly 2% worldwide while brown, reachable by many high-melanin routes, covers most of the planet. Blue is the easy one, low melanin through a single pathway that runs strongly in Northern European populations. Green asks for particular variants in OCA2, HERC2 and a handful of other genes acting on both how much melanin the iris makes and where it settles in the stroma. For another trait where the local answer and the global answer part company, the height percentile calculator does the same job for height.
The dominant-and-recessive model most of us were taught, brown over blue with green somewhere in between, is wrong in a way that shows up in real families. About 16 genes feed into iris colour, on White and Rabago-Smith's 2011 count, and their interactions produce a continuous run from very dark brown through hazel, green, blue-grey and grey. Two brown-eyed parents often have a blue-eyed child, and two blue-eyed parents can occasionally have a brown-eyed one. OCA2 and HERC2 on chromosome 15 carry most of the brown-versus-blue variance, while the green and hazel middle depends on a longer list of smaller effects. The one-gene story gets told about baldness too, and the hair loss calculator sets out what the data says there.
Eye colour clusters by country harder than almost any other physical trait anyone has measured. Around 89% of people in Iceland have blue or green eyes and around 92% in the Netherlands do. About 90% of people in South Korea, Japan and most of Southeast Asia have dark brown eyes. A single global figure for blue of 8 to 10% hides both of those facts, because a trait can be the majority in one country and effectively absent two flights away. Names cluster along the same lines, which is what the name rarity calculator measures.
Frequently asked questions
Grey, at roughly 1 to 3% of the global population and concentrated in Scandinavian and Eastern European populations. Green is second at about 2%, amber about 5%, and heterochromia turns up in fewer than 0.5% of people. Regionally the order falls apart, with green found in over 20% of people in Ireland. Prevalence by region is compiled on the body statistics page. Source: widely cited estimates; no census of eye colour exists.
High melanin in the iris, which is where human eye colour started. Sturm and Larsson warn that the simple dominant-recessive model is too crude, though one stretch of chromosome 15 explains 74% of the variation. Everyone who left Africa carried brown-eye alleles. The lighter colours arrived later, through mutations that cut melanin production in populations settling in Northern Europe, where weaker sunlight meant less pressure to keep the protective pigment. Source: Sturm & Larsson (2009).
Yes, within limits. Most babies start out blue or grey because iris melanin is still arriving, and the colour usually settles somewhere between ages 3 and 6. In adults the pigment can fade slowly. Fuchs heterochromic iridocyclitis, pigmentary glaucoma and Horner syndrome each shift the colour of one eye or both. Mood, lighting and a dilated pupil change how an iris reads without touching the pigment in it.
Polygenically. OCA2 and HERC2 on chromosome 15 do most of the work on the brown-versus-blue axis, and about 16 genes feed into iris colour altogether. That is why the schoolroom version keeps failing. Two brown-eyed parents frequently have blue-eyed children, and the odds turn on which alleles each parent happens to carry. Green and hazel come from mid-range melanin plus Rayleigh scattering in the stroma. Source: Sturm & Larsson (2009).
Yes. A blue, green or grey iris holds less melanin, so it screens less light, and people with lighter eyes report more photosensitivity and reach for sunglasses sooner. Epidemiological work also links lighter irises to a slightly higher risk of uveal melanoma, from a very low base. The American Academy of Ophthalmology recommends UV-protective eyewear whatever colour your eyes are, and says lighter-eyed people stand to gain most from wearing it consistently.
Blue-eyed people appear to share a single founder mutation, on the evidence of a 2008 study by Eiberg et al. at the University of Copenhagen, which found the same stretch of DNA in 155 blue-eyed Danes and in blue-eyed people from Turkey and Jordan. That change, inside the HERC2 gene, turns down the neighbouring OCA2 gene and with it the melanin in the iris, and it spread through Northern European populations by drift or, as Frost argued, by sexual selection. Blue now runs at 80 to 90% in Estonia, Finland and parts of Scandinavia against less than 1% in Sub-Saharan Africa and East Asia. Source: Eiberg et al. (2008); Frost (2006).
Two different iris colours, either between the eyes or inside one of them. Complete heterochromia, where one eye is fully different from the other, affects fewer than 0.5% of the population. Central heterochromia, a ring of another colour around the pupil, is far commoner, and plenty of people who have it have never noticed. Most cases are there from birth and harmless. An acquired one can point to something underlying. Source: American Academy of Ophthalmology.
Real, and routinely logged as light brown or hazel by whoever is filling in the form. True amber is a flat golden, copper or yellowish-brown tone with none of the green and blue flecks that make hazel look mottled. It comes from lipochrome, a yellow pigment, sitting alongside a moderate amount of melanin. Estimates put amber near 5% of the global population, more common in people of Asian, South American and Southern European ancestry.
No purple, and red only through albinism. Violet eyes in a photograph are very light blue irises picking up redness from the vessels behind them, sometimes helped along by the lighting or the processing. Elizabeth Taylor was said to have violet eyes and almost certainly had that effect rather than a pigment nobody else carries. A genuinely red or pink iris happens in severe oculocutaneous albinism, where melanin is absent and the blood vessels show through the unpigmented tissue.
You cannot tell from looking at the newborn. Babies arrive with blue, grey or very dark brown eyes depending on ancestry, and iris melanin keeps building over the first 6 to 12 months, sometimes still shifting at age 3. Blue at birth can end up green, hazel or brown, while dark at birth rarely lightens. Two brown-eyed parents have roughly a 6 to 25% chance of a blue-eyed child depending on their genotype, and two blue-eyed parents produce a brown-eyed child about 1% of the time. Genetic testing on both parents is the only thing that sharpens those odds beyond a rough chart.
- Sturm RA, Larsson M. Genetics of human iris colour and patterns. Pigment Cell & Melanoma Research. 2009;22(5):544-562. https://doi.org/10.1111/j.1755-148X.2009.00606.x
- American Academy of Ophthalmology. Eye colour prevalence survey. aao.org. 2014.
- Frost P. European hair and eye color: A case of frequency-dependent sexual selection? Evolution and Human Behavior. 2006;27(2):85-103.
- Eiberg H et al. Blue eye color in humans may be caused by a perfectly associated founder mutation in a regulatory element located within the HERC2 gene inhibiting OCA2 expression. Human Genetics. 2008;123(2):177-187.
- White D, Rabago-Smith M. Genotype-phenotype associations and human eye color. Journal of Human Genetics. 2011;56(1):5-7.
- World Population Review. Eye Color Percentage by Country. worldpopulationreview.com. 2026.