Indigo powder is a natural dye which is very famous now days for colouring hair black. Many people know it as black henna, but it gives a blue dye. When used with natural henna powder it gives a dark brown to shiny black colour. Generally it gives a blue dye even though it looks just like henna. It is also used to dye clothes and get a denim blue colour. In botanical language it is known as indogofera tinctoria. The indigo powder is made using the leaves of indigo plant. How to use: if u wanted black hair. Then using method is first day apply henna powder on ur hair. Wash only with water. Not oiling after wash. Then second day apply indigo powder mixed with only warm water. After ten minutes apply this paste. After half n hours wash ur hair with water. Then after one day apply oil if u want. This is good indigo powder natural n effective.