His [Hazrat Mahdi’s (as)] clothes are like fire. His face is sometimes light in color and bright as gold and sometimes dark in color and bright like the moon.
(Bihar Al-Anwar, Vol. 13)
The hadith notes that Hazrat Mahdi’s (as) clothes will generally be very bright. Hazrat Mahdi’s (as) face will sometimes be dark and bright, tanned in the Sun, and at other times it will be light, of his own Arab complexion, meaning a pinkish color, and bright.