How to Make Organic Hair Dye?

I have an experiment by mixing some organic ingredients from dried leaves and henna powder.
Instead of buying stuff to color our hair, it's better to use these.

From black hair to the brown one.

Procedure:
1)Bring to boil one big onion, garlic, dried leaves from lavender, thyme, clove,s, and rosemary for 30 minutes.

1. Cool it down.
2. Add an exact amount of henna powder to the cold boiled water.
3. Mix it well. (optional: add Nescafe, chocolate powder, and tea to enhance the brown color.)
4. Add a cup of thyme oil.
5. Let the mixture stay for one hour and apply it in your hair.
6. Cover your hair with plastic and wrap.
   7)If you want to see the brown effect, keep it 3 hours, and wash it thoroughly.

These are some ways of making our hair healthier and change its color by the organic stuff. Any hair dye could be harmful to us.

Why not trying these? It's your choice. Thank you!

Note: We bought all the ingredients from the perfume store.