You can mix indigo paste in henna paste. Do not mix coffee, tea is much better. You can try either one step or two step process ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-75ZBdFIRun4.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hZNYEoKqUzI.html