Using the herbal tea of your choice, place the tea bags in a large pot and allow them steep overnight in warm water. The kind of tea you use determines the color tone or deposits that you create for your hair. Remove the tea bags the next morning. Use the liquid to rinse your hair. Co-wash and style as usual. Tea acts as colorant naturally. Make sure you let the tea cool off before applying it to your hair. Using hot tea to rinse your hair may result in severe burns for your skin or scalp.