I love your coloring, Belowen, that contrast of dark hair, light skin, and bright eyes. Like Liv Tyler
The confusing thing about flattering eyemakeup if that you must also take your skintone and haircolor into account. For example, bronze shadow brings out my eyes, but looks jarring against my skin.
Milfbutsingle is correct; there are many different shades for each color, not just in terms of light and dark. Like if a red-based purple (ex. MAC Trax) doesn't flatter you, try a blue-based one (Parfait Amour).
The Chanel mua wasn't completely off-base, a dark emerald would be bewitching on your eyes. If you want to wear green eyemakeup, make it either much lighter or darker than your eyes, so that there is some contrast; the same color as your eyes will make your eyecolor muted in comparison.
One tip is not to focus on eyemakeup at all, as a berry, plum, or red lipcolor/blush will bring out green eyes like nothing else. This also works on blue eyes, but the effect on green eyes is even more striking. Milla Jojovich often just wears berry lipstick, and it makes her eyes glow. (If you go to Stila for eyeshadow, check out Natalie lipstick, it's amazing for green eyes.)