All natural indigo powder for hair and skin. Indigo is a pure, PPD-Free plant powder traditionally used in Central Asia and the Middle East to dye fabrics, hair, and skin a dark blue color. Indigo powder is sometimes called “black henna”, but comes from a different plant. Recent warnings about “black henna” are about PPD containing artificial dyes which create a solid black color, and are not safe to leave on the skin. Indigo powder produces a dark blue color, and is safe for hair, skin, and clothes.