Feel the power of Pure Indigo. With khadi Pure Indigo Natural Hair Color, you dye your hair into a dark, deep black with a shimmering blue nuance. Let yourself be fascinated by the bluish light play in your hair. The natural hair color is purely vegetarian and vegan. Because khadi Pure Indigo consists of 100% pure indigo. This provides a deep black color and covers all the colors below. However, you need a pre-treatment with khadi Color Prep for medium-blond or brighter hair as well as for gray and white hair. More product Information. khadi Pure Indigo is also suitable for mixing reddish nuances if you want to achieve an ashy tone. Or you use it as a rinse to reduce redness. khadi Pure Indigo colors your hair perfectly naturally. The color pigments wraps around each individual hair. It feels strong and healthy - and shines in a shimmering, mysterious blue-black.