Q: I have heard that black colour is not allowed to dye ones hair but red colour of Henna (herbal) is permitted. Is that true?
A. It is permissible to dye the hair. Do not use black dye, as this is forbidden. Also, do not use dye which contains Haraam ingredients. (Bahrur Raa’iq V8 P208). Red Henna is permissible.
Moulana Yusuf Laher