Henna, itself, doesn’t come in a range of colors. There is no such plant as “blonde henna”, “brown henna” or “black henna”. The plant, henna, lawsonia inermis, has only one dye molecule, and that molecule is red-orange. Chemicals, metallic salts or other dye plants must be added to henna to make any color other than red. These mixes are termed compound hennas.