Eye color question

[pbjmaker]

This is my "olive egger" named Black Bubby. Anywho , she has the prettiest eye color and I want to know more about it genetically. None of her daughters have had it, but her mother did (RIP) Mom was an EE and dad was a BC Maran. The color doesn't translate well through a photo but it is actually a sea foam green color. I'd like to try and have more birds with this eye color.

 

[Meara]

Some of my birds had eyes that were green or greenish, but as they've matured the color has been changing to more of a brown.