Henna, popularly known as Mehendi is a hair colouring dimension for colouring hairs brown. It is one of the best natural remedies for hair growth. Henna is a natural herbal powder which is not only used for colouring hair, but also helps to prevent dandruff and scalp itching. It acts as a good conditioner for your hair and helps to grow your hair. Indigo Powder is a natural dye which is very famous now days for coloring 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 color. 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 color. In botanical language it is known as indogofera tinctoria. The Indigo powder is made using the leaves of indigo plant.