I know that many pigmentation traits (skin, hair and eye color) are highly heritable. For instance, I assume that the heritability of eye color should be high.

I've been trying to find articles estimating heritability of these traits either based on twin studies or using more modern methods based on GWAS SNP data, for instance calculated using GCTA or LDAK, but couldn't find any.




Heritability of Skin Color
1) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC212702/

2) https://genepi.qimr.edu.au/contents/p/staff/CV018.pdf (h2 ranging from 0.37 to 0.83)

Probably for eye color will be harder, since it is usually not quantitatively measured.
 