๐๏ธ How Rare Are Green Eyes? Only 2% of People
Where Green Eyes Are Most Common
Green eyes are most concentrated in Northern and Central Europe, with the highest rates in Ireland (~20% of the population), Scotland (~15%), Iceland, and parts of Scandinavia. They're also found in pockets of Central Asia and among Pashtun populations in Afghanistan and Pakistan. Outside these regions, green eyes are extremely uncommon.
The Genetics Explained
Green eyes result from a combination of moderate melanin in the iris stroma, the presence of lipochrome (a yellow pigment), and Rayleigh scattering of light. Unlike brown eyes (high melanin) or blue eyes (very low melanin), green requires a precise middle ground. Multiple genes contribute, including OCA2, HERC2, and SLC24A4.
Green Eyes + Other Rare Traits
Green eyes + Red hair: ~0.03% of population (1 in 3,300)
Frequently Asked Questions
Green is the rarest common eye color at ~2%. Gray and violet are technically rarer but are much less frequently categorized separately.
Why Green Eyes Are More Common in Some Countries
The figure of about 2% is a worldwide average. Green eyes are uncommon across most of East Asia, South Asia and sub-Saharan Africa, home to more than half the world's population. Where European ancestry is common, the share is much higher. A 2025 PLOS One study used driver's licence records from 31 US states, covering 235,423,085 licence holders. It found brown or black eyes in 53%, blue in 23.7%, hazel in 10.3%, green in 9% and grey in 0.7%. With more than four in ten reporting a lighter eye colour, a green share several times the world average follows.
This data has limits. Licence holders report their own eye colour, and the authors note that “the self-reported nature of iris color may lead to misclassification bias.” Nationally, hazel was slightly more common than green, but seven states recorded more green than hazel: Missouri, Texas, West Virginia, Wisconsin, Georgia, Kentucky and Nebraska. That may reflect how people describe their eyes as much as real pigment differences: green and hazel sit side by side on a continuum, so the boundary is partly a judgement call.
Why DNA Struggles to Predict Green Eyes
HIrisPlex-S is a forensic system that predicts eye, hair and skin colour from 41 DNA markers. A 2026 study of 152 people in northern Germany compared its predictions with participants' self-reported eye colours. It correctly identified 94.7% of brown eyes and 98.5% of blue eyes. Forty-seven described their eyes as intermediate, the authors' term for any colour not clearly blue or brown, such as green or a mix. The system labelled 34 of them blue, 13 brown and none intermediate. Its accuracy score, where 0.5 means chance and 1.0 means perfect, was 0.96 for brown, 0.89 for blue and 0.61 for intermediate.
The authors report that the predicted probability of intermediate eyes stayed very low for every participant, which is why nobody was assigned to that category. One reading, an inference rather than a finding of theirs, is that the best-known markers describe a single scale from blue to brown, with green in the middle and no genetic switch of its own. A colour that depends on landing in a narrow middle band would be both rarer and harder to call from DNA.
Green Eyes at Birth
In the Newborn Eye Screening Test (NEST) study, a specialist graded eye images from 192 newborns. Green or hazel irides appeared in 5.7% of the babies, just 11 infants, against 63% brown and 20.8% blue. A newborn's eye colour is not final. The Louisville Twin Study found most children's colour had settled by about six years of age, yet among 1,359 white subjects 3.8% to 8.6% shifted at least two shade units between age six and adulthood, and its authors concluded that 10% to 15% keep changing through adolescence and adulthood. These were real pigment changes, unlike the way adult green eyes seem to shift shade with lighting or clothing.
Green Eyes and Uveal Melanoma Risk
Eye colour is linked to uveal melanoma, a rare cancer inside the eye. A Dutch study compared 412 patients in Leiden with 5,951 people of European ancestry from the Rotterdam Study. Before adjustment, green or hazel eyes carried odds 3.64 times those of brown eyes (95% confidence interval 2.57–5.14), against 1.38 (1.04–1.82) for blue or grey. So green and hazel carried a higher risk than blue, despite blue holding less pigment. The authors offer a mechanism: pheomelanin, the yellow-red pigment abundant in lighter irides, generates more reactive oxygen species under light than darker eumelanin, so cells holding it may accumulate more DNA damage.
The starting rate matters more than the multiplier. Across 45 years of US cancer registry data, uveal melanoma was diagnosed in about 5.6 people per million a year, rising to roughly 6.7 per million among white Americans. An odds ratio from a patient-and-control comparison cannot simply be multiplied by a whole-population rate to yield a risk for green-eyed people, so no published figure of that kind exists. A several-fold relative increase still starts from a very small base, leaving the absolute risk for any one green-eyed person very low.