Commentary for Leviticus 13:37

ושער שחור AND [THERE BE] BLACK HAIR — Whence do I know that this applies also to yellow or reddish hair which also, like black hair here mentioned, are not gold-coloured? Because it states ושער “and hair” (whatever its colour may be) (Sifra, Tazria Parashat Nega'im, Chapter 9 14). The expression צָהוֹב denotes anything like the appearance of gold, and צהוב is equivalent to זהוב, orpàle in old French (English = pale gold).

טהור הוא וטהרו הכהן, "he is 'clean;' and the priest shall declare him "clean" (ritually pure)." This apparent repetition is explained in the Torat Kohanim as follows: We would have thought that it suffices if the priest simply allows the afflicted person whose נתק has remained unchanged in appearance except that black hair grew on it, to go back to the camp; to teach me that this is not sufficient, the Torah tells us that the priest must first declare such a person as "clean." I would also have thought that if the priest erred and erroneously declared a ritually impure person "clean," that he would henceforth be considered "clean;" this is why the Torah had to write טהור, he is objectively "clean;" the priest merely confirms it. This is an exegesis which Hillel taught when he came from Babylonia as the scholars in Israel at the time had been unable to furnish proof for this halachah from the text of the Torah (compare Jerusalem Talmud Pessachim 6,1). We need to understand why the scholars who had disagreed with Hillel at that time did so.

Tzohov [is] like zohov. That which Rashi explains this here and not above [where it says] (v. 30): “and there is a golden hair in it,” is because above it could be explained that whatever is not black is called tzohov, but after he explains that red and green are included in the word “ושער (and hair)” and are included in “black,” if so, it poses a difficulty: What does tzohov mean? Thus, he explains, etc. (Devek Tov).