When I was on the hunt to find a dark blue for my Mom's Camaro mani, I ran across China Glaze - Grape Juice. I picked the bottled up and put it down 4 times before RJ had to tell me to, "just get it already!" So I did!
Here is a quick swatch of it. This is such a fun and sparkly color. It reminds me of Welches Grape Soda from when I was a kid.