Naturtint Permanent Hair Color 2N Brown-Black is one of the 10 Natural shades. Find the right hue for you with Naturtint color chart! Similar options include 1N Ebony Black and 3N dark Chestnut Brown. You can go as dark as you like in one treatment, but with Naturtint, you can only lighten by one or two shades; more than that can often create unwanted brassy tones.