Revvvolution is a dark charcoal gray holographic polish; I know a lot of people say it's a black holo, but it's really not dark enough for me to consider it black. The photo below is a better representation of the actual color. I can see myself wearing this a lot once autumn comes around.
I literally could rave for days about the awesomeness of this polish. The formula is absolutely amazing (by the way, I used two coats here, but I easily could have used only one if I had been more attentive) and it is one of the most unique and interesting colors I own. This was my first Color Club purchase and it certainly won't be my last if all of their polishes are as great as this one.