One color that does not exactly work for green eyes is silver. Now, I am not talking about jewelry of course, but silver and gray eyeshadows do not exactly look all that green with green eyes. They conflict a little bit. Stick to warm colors and plums.
Heterochromia - A beautiful mutation that causes the iris to have more than one color, or a person can have two different colored eyes - example: one brown eye and one blue eye. [And here I thought hazel eyes were just always multi-coloured]