You could always go with the classic "Poached Eye" because he has a blue eye (black and blue). You could also use the comedy movie "Mickey Blue-Eyes" as inspiration. Funny movie, if you haven't seen it! Forgive me if I'm wrong, but opal is a blue-ish color, right? .....I'm a guy....please forgive me. You gotta stick with red, green, blue, yellow, black, etc. for me!
A sure way to lose people like me is to use colors like Mauve, Carnation, Tope, Alabaster, etc (like opal). :huh: