I had gotten this bottle of Essie: One Day Without Blues free for "liking" Tom's Shoes on Facebook. Tom's and Essie joined forces to promote Tom's fundraiser, One Day Without Shoes on April 5th. I'm assuming that this color is a limited edition and was only made for this fundraiser, but is very similar to Coat Azure that I've seen in stores. I wouldn't be surprised if they just changed the shade by one gradient. It's not exactly my favorite color, but I wanted to try it out since it was sitting on my desk and I really enjoy Essie polish. Can't argue with something that is free and supports a good cause!