This design occured by accident: I tried to sponge a gradient design with three colors at the same time. It didn't work, so I just sponged all over it again.
I used three pretty colors from Essie:
Velvet Voyeur, Angora Cardi and In Stitches.
And I used a new fast drying top coat from Revlon which I'm testing at the moment. It's very expensive but I've heard good things about it. So far I'm happy with the result but I need to test more polish / nail art variations to be sure.