It's Parrot Green by Mattese N.Y.C. I wish I knew more about this line (they carry lip and eye colors as well). The varnish was recommended to me by a client and I searched all over the internet for it! I finally got mine at Perfumania but it looks like they are out of it now. If you live in NYC, or are planning to visit, you can get it at Ricky's.
Check out my new Marc by Marc heels!