Standard
Eye color
HERC2 / OCA2 · rs12913832
What each result means
A/A
Published research associates this genotype with brown eye color — reduced OCA2 expression allows more melanin production in the iris.
A/G
Published research associates this genotype with intermediate eye color (often green or hazel), though many other genes also contribute.
G/G
Published research associates this genotype with blue eye color — this variant reduces OCA2 gene expression, lowering melanin production in the iris. This single variant is the single strongest predictor of blue vs. brown eyes, though it is not the only gene involved.
Source: Eiberg et al. 2008, Human Genetics — blue eye color in humans linked to a single HERC2/OCA2 variant.
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