Extra Credit · Mishnah Nega’im
English: But if the priest examines it and there is no white hair in the bright spot, and it is not lower than the skin but is dim, the priest shall isolate him for seven days.
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:26
Mishnah Nega’im 1:1 — the traditional scale of the four shades of nega’im.
Mishnah.org — Nega’im 1:1 · Sefaria — Mishnah Nega'im, chapter 1
English: The appearances of nega’im are two that comprise four shades: baheret is bright like snow, with its next shade like temple lime; se’et is like the membrane of an egg, with its next shade like white wool, according to Rabbi Meir. The Sages reverse the order of the latter two shades.
The Mishnah defines a graduated scale of lesion whiteness rather than treating all white marks as identical. This provides context for the verse’s careful attention to whether the mark is bright or dim and whether the other signs are present.