Indigo powder is a dye that comes from the crushed leaves of the indigo plant. It is a natural dye that you can use to color your hair or beard, with or without henna. Indigo is an all-natural hair dye that does not harm your hair in any way. It treats and prevents premature greying. It can lead to new hair growth and treat baldness. It treats dandruff and conditions dry hair. Indigo powder prevents scalp infections and soothes the scalp.