Essie Merino Cool is from their Fall 2010 collection. It is grey purple, changing color depending on the light that you're in. As always, the Essie formula was superb, only needing 2 coats for opacity. And it wore like iron, it didn't even chip. I ended up changing the color because I was ready for a change after 6 days. I took two photos to show you the color change in different lights. The one above is artificial light, the one below is sunlight.