Yes, that would be wonderful! It can get quite confusing to look at pictures of chickens, and comb through pages of genetics information, and TRY to make it match up right. I would love to have DNA tests for a bunch of genes, and then it would be easy to post photos of chickens with their DNA test results, and we could all learn what is going on with them!
I've seen photos of blue chickens that have black heads, and several shades of gray at different places on their bodies.
For example, McMurray's photos of Blue Andalusians show at least one hen with her head much darker than the rest of her plumage, and several photos of roosters that have heads & backs much darker than their breasts:
https://www.mcmurrayhatchery.com/blue_andalusians.html