Blue henna (Indigofera tinctoria) is one of the oldest known dyes used in Ayurveda. It is used to dye the hair. Apart from this, it also has numerous healing properties. It pacifies kapha and pita doshas in the body. It helps in cooling the boy. It is effective against dandruff. It is antipyretic and helps in reducing fever. It also calms the nervous system. It is also used as a pain reliever.