Make him like my son, from one angle they are pretty brown, from another they are green. The Army has his eye color down as green/brown. They aren't hazel either.
can be very deceptive, but I also think different people will relate differently with different colors depending on their color preference. I do think that if a character has solid bright colored eyes gives them a better advantage to be deceptive, whatever color they maybe. Blinded colors seem to be easier to read a character's motive. That is just my opinion.
I think green eyes have a certain air of mystery around them. This is a hard choice! Blue and green are my two favourite colours, and both would go excellently with my hair if I had them...
As for your other guy, I think a thief should have brown eyes.
I don't know why, just a random choice I guess.