I wore this on Monday after swatching DDP Blue Diamond, it was the perfect closure for the day. I'm hoping for more sun so that I can continue swatching my untrieds, I've accumulated a few this season, I'm afraid. I think this is better layered, to avoid it being too bumpy, so one coat over any blue should work. The pictures really speak for themselves on this one, I have no comments.
1 coat Darling Diva Polish Blue Diamond
1 coat NailNation H2-Ohhh
OPI DS Topcoat