I'm having a navy moment at the...moment. This is a creme polish, one of five I have from Models Own, whose polishes I love. In The Navy is a great, deep inky blue. In a lot of lights it looks black, but when the light hits it, you can see it in all its glory.
In The Navy doesn't chip too badly, goes on really well (this is two coats) and is the perfect shade to take up into the Autumn with a sophisticated sweep. Available at Boots on online here.