Here is an amazing article that talks about natural options:
http://www.naturallycurly.com/curlreading/super-kinky/coloring-type-4-hair
Many woman on our site use coffee as well as henna.
http://www.naturallycurly.com/curlreading/hair_color/henna-and-hair-color
1. Apple Cider Vinegar causes the hair cuticles to close, but it also
brings out red tones in your hair- even dark hair. It can be used to help grey hair take color better and it has been alleged to assist grey hair to return to natural color.
2. Green Tea brings out
red tones in brown/dark hair.
3. Black Coffee - tones down red tones,
deepens brown-red tones, and covers grey.
4. Red Hibiscus Tea enriches
red tones in dark hair.
5. Cinnamon (used alone) enhances
red tones in hair. Can also tingle scalp.
6. Rosemary, Raspberry leaves, Parsley, Ivy Berries, Catnip, make dark hair more
chestnut.
7.
Regular Vinegar can give some of the same effects of ACV, but it
brings out more blonde in the hair.
8. Ceylon or Black China Tea will add
gold highlights when added to some types of henna.
9. Chamomile Tea lightens - lightish hair. Brings out more
blonde.
10. Lemon juice lightens hair and brings out
blonde highlights. Can be added to some hennas to get blonde colors.
11. Juice from a
boiled and peeled white potato adds strong
light highlights to dark hair.
12. Marigold petals gives
golden highlights to light hair and brings out
red and gold highlights in light brown and red hair.
13. Rhubarb root adds
honey gold tones to brown hair and if you add lemon, grapefruit, or pineapple you can boost
gold/blonde highlights for both blondes and dark hair.
14. Honey
lightens all hair and is a natural peroxide booster.
15. Cardamom
lightens all hair and is a peroxide booster.
16. Honey combined with cinnamon and cardmon can lighten all hair to a
light red or reddish blonde faster (dending on starting color or how much of each you use), but not as fast a commercial color.
17. Sage
deepens brown and black hair and covers greys.
18. Tag Elder Bark achieves lighter colors than sage- so it is used to
darken dark blonde and cover gray in medium to light brown hair.
19. Walnut Hulls mixed with ground cloves or allspice make a
sable brown color. This can also stain anything it comes in contact with.