Then the priest shall see the disease: and, behold, if it is in sight deeper than the skin; and there is in it yellow thin hair; then the priest shall pronounce him unclean: it is a scaly eruption, even a leprosy upon the head or beard.
Read Chapter 13
George Leo Haydock
Leprosy, or scurf. (Calmet)
This species causes the hair to be yellow, and not white. (Menochius)