I saw a girl the other day wearing Sephora by OPI Metro Chic, and it made me want to wear it again, so here it is (2 coats):
I had recently picked up Gray's Anatomy from the new Wet N Wild FastDry line, and tried it quickly over my old Chanel Paradoxal manicure. It looked really cool because Paradoxal resembled the base color in Gray's Anatomy, but because Gray's is a bit sheer, Paradoxal really deepened it.
So I decided I'd try Gray's over Metro Chic, since it matched the base color even more closely. In my opinion, it's not as beautiful as it was with Paradoxal, but it's still very amazing! (And it's a $1.99 dupe for Deborah Lippmann's Wicked Games!)
That last couple pictures really show the green side of the polish, which is most visible at extreme angles to the light source, though as you can see both the green and purple can be seen together in many views. It's a more subtle duochrome, but still very striking. I recommend layering it over a darker color like Zoya Kelly or Sally Hansen Gray Area.