The Ruling on Dyeing the Beard Black

Question:

What is the ruling on dyeing the beard black, and what is the ruling on the one who does so?

Answer:

It is not permissible to dye white hair black, whether it is on the head or on the beard, because it has been confirmed by authentic Hadiths from the Prophet (sallallaahu alaihi wa sallam) that he forbade it.

But it is lawful to change it to a colour other than black, such as red or blonde, with henna and Katam mixed together, based upon the saying of the Prophet (sallallaahu alaihi wa sallam): Change this white hair, but avoid black. [1] And his saying (sallallaahu alaihi wa sallam): Verily, the Jews and Christians do not dye their hair, so be different from them. [2]

And Allah is the Granter of success.

[1] Muslim no. 2102 and Abu Dawud no. 4204 [2] Muslim no. 2103

Shaykh `Abdul-`Azeez Bin Baz
Fatawa Islamiyah Vol. 1 Page 392