Albert Barnes Commentary Leviticus 13:6

"and the priest shall look on him again the seventh day; and, behold, if the plague be dim, and the plague be not spread in the skin, then the priest shall pronounce him clean: it is a scab: and he shall wash his clothes, and be clean." — Leviticus 13:6 (ASV)

Somewhat dark — Rather, somewhat dim: that is, if the spot is dying away.