I deeply adore blue nails, but my history of loving "sk8r bois" and Hot Topic also makes me partial to black nails. In comes navy.
This color has a very, very dark blue base and a lot of blue shimmers that make it very obviously not black, and somehow make the darkness colorful.
The formula is standard, 2 coats for full opacity. I do not think Essie polishes stay the best, but the color is so unique that I can deal with the formula. The problem is that, since it's so dark, when it does chip it is very obvious.