HERC2 rs7214306: Understanding Your Genetic Eye Color Markers
The rs7214306 variant is a non-coding genetic marker located within the HERC2 gene region. It is statistically associated with human eye color differences, specifically influencing the regulation of pigmentation pathways.
What each genotype means
Likely blue eye color
This genotype is strongly associated with reduced expression of the OCA2 gene, which is a primary driver of melanin production in the iris. Individuals with this genotype have a significantly higher statistical probability of having blue eyes compared to those with the G allele. Please note that eye color is a complex trait influenced by multiple genetic and environmental factors, so this result is a statistical association rather than a definitive prediction.
This genotype is most common in populations of European ancestry and is relatively rare in other global populations.
Intermediate eye color potential
Carrying one copy of the A allele and one copy of the G allele suggests an intermediate genetic influence on iris pigmentation. Research indicates that the G allele is dominant regarding its effect on OCA2 expression, often resulting in brown or non-blue eye colors. This genotype represents a heterozygous state where the regulatory impact on eye color is less pronounced than in homozygous individuals.
This genotype is frequently observed in populations with mixed ancestral backgrounds or in European populations where both alleles are common.
Likely brown eye color
This genotype is associated with typical OCA2 gene function, which supports normal melanin production in the iris. Individuals with this genotype are statistically much more likely to have brown or dark-colored eyes. As with all polygenic traits, this genotype is one of many factors that contribute to your overall eye color phenotype.
This is the most common genotype globally, particularly in populations outside of Europe where brown eye color is the predominant phenotype.
What is rs7214306 and Where is it Located?
The rs7214306 variant is a single nucleotide polymorphism (SNP) situated within the HERC2 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This specific variant is located in a non-coding region, meaning it does not provide instructions for building a protein directly. Instead, it sits within a genomic neighborhood that is highly influential for human pigmentation. The HERC2 gene is located on chromosome 15 and is physically adjacent to the OCA2 gene. Because these two genes are so close together, they are often inherited as a block, and variants in this region are frequently studied together to understand how they collectively influence physical traits like iris color.
The Role of the HERC2 Gene
The HERC2 gene, or HECT and RLD domain containing E3 ubiquitin protein ligase 2, plays a complex role in cellular function. While its primary known association in the public eye is its link to pigmentation, it is also involved in DNA repair and protein degradation processes within cells. The region surrounding HERC2 acts as a regulatory hub for the neighboring OCA2 gene. The OCA2 gene is essential for the production of melanin, the pigment that gives color to our skin, hair, and eyes. Research suggests that certain variants in the HERC2 region can act as switches, affecting how much OCA2 is expressed. When these regulatory elements are altered, it can lead to differences in the amount of pigment deposited in the iris, contributing to the spectrum of human eye colors.
Research and Evidence Strength
The association between the HERC2-OCA2 region and eye color is well-documented in scientific literature, with several SNPs in this area serving as strong predictors for blue versus brown eye color. However, the evidence for rs7214306 specifically is considered limited compared to more famous markers like rs12913832. While rs7214306 is often found in linkage disequilibrium—meaning it is frequently inherited alongside other variants that have a known, strong effect on pigmentation—it is not always the primary driver of the trait. Current research in the GWAS Catalog and other databases highlights that while this region is a major genetic determinant of eye color, the specific contribution of individual SNPs can vary. Because eye color is a polygenic trait, meaning it is influenced by many genes working in concert, no single SNP can perfectly predict an individual's phenotype.
Population Frequency
The rs7214306 variant is commonly observed in European populations, with a minor allele frequency typically ranging between 0.25 and 0.35. Because this variant is part of a haplotype block that has been subject to evolutionary selection in certain regions, its frequency can vary significantly across different global ancestries. In many non-European populations, the distribution of this specific variant and its associated haplotypes may differ, reflecting the diverse genetic history of human pigmentation. Understanding these frequencies helps researchers map the migration and adaptation patterns of human populations over thousands of years.
What You Can and Cannot Do With This Information
Genetic information regarding variants like rs7214306 is primarily educational and intended to provide insight into the biological basis of human traits. It is important to remember that this information is not a diagnostic tool. You cannot use this data to predict complex health outcomes or to definitively determine physical traits, as environmental factors and other genetic interactions also play significant roles. If you have received this information from a direct-to-consumer genetic test, view it as a window into your ancestry and biological makeup rather than a medical report. Always consult with a qualified healthcare professional or a genetic counselor if you have concerns about your health or if you are interested in understanding how your genetics might influence your physical characteristics.
How common is this variant?
The rs7214306 variant is common in European populations, with a minor allele frequency of approximately 0.25 to 0.35.
Frequently asked questions
Can this SNP predict my exact eye color?
No, this SNP cannot predict your exact eye color. Eye color is a complex trait influenced by multiple genes and environmental factors, and this variant only provides a partial statistical association.
Is rs7214306 linked to any diseases?
While the HERC2-OCA2 region is involved in pigmentation, which can influence skin cancer risk, rs7214306 itself is primarily studied as a marker for eye color. It is not a diagnostic marker for any specific disease.
Why do my results differ from my actual eye color?
Genetic markers are statistical associations, not absolute rules. Other genes, such as those involved in iris structure and pigment distribution, also contribute to your final eye color, which may override the effect of a single SNP.
Should I be concerned about my genotype for this variant?
There is no reason for concern regarding this genotype. It is a normal variation found in many people and is simply a part of the natural genetic diversity that contributes to human physical appearance.
Sources & further reading
Educational information only, last refreshed 9/17/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is located in an intron of HERC2 and acts as a major regulatory marker for OCA2 expression, strongly influencing human eye color variation.
A well-documented marker in the HERC2/OCA2 region strongly associated with blue vs. brown eye color variation.
Intronic regulatory modifier in HERC2 acting as an enhancer upstream of OCA2 to fine-tune human iris pigmentation and hair shade traits.
Variant in the HERC2-OCA2 regulatory locus significantly associated with iris pigmentation and blue versus non-blue eye color variation.
Strongly determines human eye color; the C allele is associated with blue eye color and the T allele with brown eye color via long-range regulation of the OCA2 promoter.
Regulatory SNP in HERC2 that modulates OCA2 expression, serving as a primary determinant of human eye color.