Chanel Fortissimo 681 is from the Blue Rhythm also seen as Blue Note collection released for summer 2015, the other polish is Vibrato 665, click HERE to see it. Fortissimo is a dark blue with a gorgeous blue shimmer. It is easy to work with and you see it in two easy coats.
I love it very much - but find it hard to choose between Vibrato and Fortissimo.