The brand is China Glaze and the shade is Midnight Ride. The quality is very good. It's a special colour, not quite purple, black or blue, but a mix of all that and I think that one coat might have been enough...however, I applied two coats.
I was extremely pleased with the result. And it stays excellent (even after taking a hot bath, nothing was changed).
This has become my favourite brand together with Essie.