China Glaze's Bahama Blues collection was one of my favorite three from them. I mean all blue - how wonderful is that?! Caribbean Blue was one of my favorites from that collection.
It's a sky blue that isn't pastel or stark. It has micro glass flecks that gives it shimmer. I've never been to the Caribbean but I would think this is what the water looks like. This is one I put on and it makes me happy.