Today's NOTD is Essie's Merino Cool, released in their Fall 2010 collection. This is a purple/grey chameleon shade that didn't really spark my interest until I saw it in person. I'm a sucker for purples, but this color changes so drastically depending on the lighting and surrounding environment that sometimes it looks entirely slate grey. However, when you catch it in the right lighting, it's beautiful.
Now in the above photo, the polish clearly looks grey. So I decided to include a few comparison photos in this post to give you a better idea of it's true color. Below is Merino Cool next to Essie's Chinchilly, a light grey. In this comparison you can start to notice the purple tones in Merino Cool.
Here is another comparison of Merino Cool to OPI's You Don't Know Jacques!, a taupe-grey color: