Henna-based hair colors are for those who not only want to color their hair but also want to give their hair a dose of natural hair color, henna. Prem Dulhan Hair Henna is one such hair dye, known for its quality features. Nine herbs aka hair tonics in it will surely tempt you to use it for overall hair care and coloring. This is a henna-based hair color, which is also ammonia-free. Ammonia, while coloring your hair, damages them in an irreversible manner.