Authentic powdered indigo leaves from Rajasthan
 
For blonde & brown tones, always needs to be combined with henna:
-  A mix of henna & indigo for blondes & light browns
- A first step of henna & a second step for indigo for dark browns and black (see the other picture)
 
Indigo takes a couple of days to oxydize and reach the final colour. Do not wash your hair until it has fully oxydized.