Is anything known about the genetics of eye color beyond brown

Eye Color & Genetics

If blue eyes were a genetic mutation, is it possible for another mutation that could create a different eye color? - Quora

What is Eye Color? - Board Certified Eye Doctors

Amber Eye Color, Blog

What is the rarest eye colour in the world? - BBC Science Focus Magazine

Do people with light colored (hazel) eyes get along better than people with dark colored (brown) eyes? Why or why not and what evidence do you have for your answer? - Quora

How one ancestor helped turn our brown eyes blue, The Independent

Dead for hundreds of years, but now we can learn hair, eye color

What Is the Rarest Eye Color? You Might Be Surprised