how to color hair naturally without using chemicals

Here is an excellent hair pack recipe to color your hair naturally
Soak a cup of henna powder in 2 cups of black tea water and leave for overnight.In the morning add 4 tbsp of lime juice, 2 tbsp of dark coffee powder and 4 tbsp coconut oil.Wet your hair and apply this pack.Cover your hair with a shower cap and leave for 1 hour.Rinse with cool water and apply hair conditioner.