Leviticus 13:3
13:3 The priest must then examine the infection on the skin of the body, and if the hair in the infection has turned white and the infection appears to be deeper than the skin of the body, then it is a diseased infection, so when the priest examines it he must pronounce the person unclean.
Leviticus 13:19-20
13:19 and in the place of the boil there is a white swelling or a reddish white bright spot, he must show himself to the priest.
13:20 The priest will then examine it, and if it appears to be deeper than the skin and its hair has turned white, then the priest is to pronounce the person unclean. It is a diseased infection that has broken out in the boil.
Leviticus 13:42
13:42 But if there is a reddish white infection in the back or front bald area, it is a disease breaking out in his back or front bald area.
Leviticus 13:49
13:49 if the infection in the garment or leather or warp or woof or any article of leather is yellowish green or reddish, it is a diseased infection and it must be shown to the priest.