1. White hair
2. Cassia on white hair (light blonde)
3. Four parts cassia to one part henna on gray hair (bright strawberry blonde)
4. Four parts cassia to one part henna to one part buxus dioica (light ash blonde)
5. Four parts cassia to two parts henna to two parts buxus dioica (dark ash blonde)
6. One part henna to one part buxus dioica (darkest ash blonde or lightest brunette)

Instructions: Mix buxus dioica powder together with henna and cassia powders in the proportions you want.  Stir in enough lemon juice or orange juice to make a mix about as thick as mashed potatoes.  Let the mix rest for about 12 hours.  Stir in a little more juice until the mix is as thick as yoghurt.  Section your hair.  Apply the mix to your hair as you would apply henna.