Leviticus 13:49

if the disease be pale or somewhat reddish in the cloth or skin: whether it be in the warp or the woof or any thing that is made of skin, then it is a very leprosy, and must be showed unto the priest.

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Summary

And if the plague be greenish or reddish in the garment, or in the skin, either in the warp, or in the woof, or in any thing of skin; it is a plague of leprosy, and shall be shewed unto the priest:

General references

Bible References

It is

Leviticus 13:2
"When there appeareth a rising in any man's flesh - either a scab or a glistering white - as though the plague of leprosy were in the skin of his flesh, then let him be brought unto Aaron the priest or unto one of his sons, the priests.

General references

Leviticus 14:37
If the priest see that the plague is in the walls of the house, and that there be hollow streaks pale or red which seem to be lower than the other parts of the wall,