There is evidence that as many as 16 different genes could be responsible for eye color in humans; however, the main two genes associated with eye color variation are OCA2 and HERC2, and both are localized in Chromosome 15.
The gene OCA2 (OMIM: 203200), when in a variant form, causes the pink eye color and hypopigmentation common in human albinism.
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The earlier belief that blue eye color is a simple recessive trait has been shown to be incorrect.
The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur.
These changes are known as single-nucleotide polymorphisms or SNPs.
Another potentially confounding factor: Blue-eyed people often have longer chins, which may make them look less baby-faced—and research correlates higher ratings of honesty to people with baby faces (not to be confused Grammy Award-winning R&B musician "Babyface").
Moral of the (eye-color) story: The conclusions of this study were just preliminary.
The eye-opening results: Iris color significantly influenced perceived trustworthiness, with brown-eyed faces being considered more trustworthy than blue-eyed ones.
To their credit, baby-blues were found to be more attractive.