Saw this little gem and had to give it a try.
First time I've come across an indigo-like shade.
Dark blues and purples have always been a great choice for dark shaded nail polish, especially if you're trying to move on from blacks and bronzes or even dark reds.
From Bourjois Paris cosmetics.
Nail Laquer, So Laque! in Blue Violet.
As to my shiteous lighting, I wasn't able to capture the color of the polish without flash. But be assured, it's as the bottle shows.