Beau Inks Organic Pigment: Indigo - beautiful deep purple.

It will be a great color for a double liner. 

15ML. Bottle

**If you want to deepen up your Indigo, or your Lapis you can use your Onyx Black, Onyx Black C, or Onyx Black CI, just keep in mind that if you use Onyx Black C you will have to add a small amount since this color is a carbon black base and is much stronger