What is the fatwa on dying grey hair, beard and Mustache?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

Dying hair or beard is permissible with the following conditions:

1. The hair should not be dyed with black colour for the Hadith of the Prophet (Sallallahu Alaihi wa Sallam) who said: "At the last period of this world, some people will dye their hair black, they will not get the smell of paradise." (Abu Dawud)

 When the Prophet (Sallallahu Alaihi wa Sallam) ordered to change the grey coloured hair of Abu Quhafah, the father of Abu Bakr, he said: "change the whiteness of the hair, but avoid black."

2. It should be free from the imitation of dissolute persons, polytheists, and Kuffars. The Prophet (Sallallahu Alaihi wa Sallam) said: "whoever imitates a nation he becomes one of them." (Abu Dawud)

If the dye is free for the above prohibitions then it is allowed even if the hair is black.

Allah knows best.