I tried Green 16L, which is a medium muted green shade with yellow undertones. It's not quite olive, but it's getting there. This makes a surprisingly great neutral on my brown eyes, and brings out the green and yellow tones in them. I love wearing this on the lashline with a khaki taupe shade (MAC Sweet Sienna pigment is the perfect color to match, wearing it in photo on the lid). I usually wear Green 16L on the upper lashline and apply generous coats of mascara to give it some contrast, otherwise it wouldn't contrast my eyes enough.
Make Up For Ever makes some of the best products on the market today, and Aqua Eyes is no exception. These liners are really rich in pigment and smooth in texture. They don't tug on the eyes have really amazing lasting power - even the darker shades. For $17, you get .17 oz of product. That doesn't seem like much, but these are probably one of the highest quality pencil eye liners you will ever meet, and they don't smudge!