I can't use any of the hair dyes as I have a bad skin reaction.
In the Summertime, I use to make a strong chamomile infusion and rinse my hair with it and lay under the sun for hours. It actually lightened my blond hair naturally.
I also read where herbs, specifically sage, can dye the hair naturally:
Quote:To make a herbal hair dye:
Simmer 60g of selected herb(s) in 1 litre of water for 20 minutes with the lid on the pan. Cool, strain, and pour the liquid through the hair, catching the rinse in a bowl. Repeat as many times as possible, using the same liquid over and over. Pat hair dry, using an old towel as some of the dye will come off as you dry. The more often you use these dyes, the stronger the colour will be. Commercial herbal teabags can be used, infused in 4 cups of water.
For more intense colour, make a paste by using 1 cup water, 30g selected herb(s) and kaolin powder. Wearing plastic gloves, rub well into the hair and scalp, cover the head with a hot towel and a plastic bag to retain heat, and leave for 20 minutes. Rinse clear.
TO DARKEN HAIR:
Use sage, or sage and rosemary leaves, or sage and dried raspberry leaves, or ivy berries.
You can also use ordinary black tea as a hair dye, using it in the same way as described above.
Walnut hulls with herbs are an extremely effective way to darken hair (and everything else). Always wear gloves when working with walnut hulls. Crush walnut hulls, cover with boiling water, and let them soak for 3-5 days.
Add 3 more cups of fresh water to the walnut water and simmer for 4 hours. If the water steams off add some more. Strain the liquid to get the hulls out. Reduce the volume of liquid to about a quarter of what you started with by boiling. Add one teaspoon cloves and one teaspoon cinnamon. Mix well. Now let it sit for a week or two in the fridge, It will get darker the longer it sits. Apply 15-20 times as a rinse to newly washed hair. Dont wash your hair right way after applying the rinse.
I don't visit this forum, but it confirms what I read in my herbal studies previously and has the recipe conveniently spelled out.