Indigo plants are small. After plucking leaves from the plants farmers leave the leaves to dry in the sun. After complete dryness of leaves another process of grinding starts. After grinding it is ready to put on hairs with little water like paste and process of dyeing hair is similar like Natural Henna and other henna based colors in India. In many countries people like to dye their hair by Indigo because it is 100% safe herb for hair. Presently only good quality Indigo is the original herb which gives brown or light black tone to hairs after mixing some percentage of Natural Henna in it. Many hair manufacturers mix chemical to give brown or black color to hairs. Only Indigo is the herb which helps to give deep color to hairs.