Truly its something we all don't think about to much is it?

Eye color in wild canids is generally light, wolves have eyes with pale irises. In fact that is part of why the stare of a wolf is unnerving to humans. Most humans respond to a direct, fixed stare by feeling threatened and when the iris of an eye is light then it is quite easy to tell exactly where the light eyed individual is staring. I (BD) personally beleive this is the major reason that most standards on European dogs call for a dark eyed dog.

somewhat kinda a mix but as of recently they became all green.. and little bit of yellow i think.. not 100% sure on the yellow thing but they look alot more intresting now.