Pure henna hair dye can cover grey hairs safely without causing damage. Henna is derived from the Lawsonia plant, contains no chemicals and is a mild colorant for all hair types.
Pure henna tints the hair a reddish-brown color. Herbs such as chamomile, indigo, cassia or amla help achieve different shades varying from dark auburn to black.
To make a henna paste, combine 1 cup of henna powder with 1 cup of orange juice in a bowl. Cover the bowl securely with plastic wrap and allow the mixture to steep overnight. Add 1/2 to 1 cup of purified water and set aside for 12 to 24 hours before applying the paste to hair.