וְהָיָ֨ה הַנֶּ֜גַע יְרַקְרַ֣ק ׀ א֣וֹ אֲדַמְדָּ֗ם בַּבֶּגֶד֩ א֨וֹ בָע֜וֹר אֽוֹ־בַשְּׁתִ֤י אוֹ־בָעֵ֙רֶב֙ א֣וֹ בְכָל־כְּלִי־ע֔וֹר נֶ֥גַע צָרַ֖עַת ה֑וּא וְהָרְאָ֖ה אֶת־הַכֹּהֵֽן׃
If the plague be greenish or reddish in the garment, or in the skin, or in the warp, or in the woof, or in any thing of skin, it is the plague of leprosy, and shall be shown unto the priest.
Rashi on Leviticus
ירקרק denotes green amongst the greens (the deepest green).
Rabbeinu Bahya
או בכל כלי עור, “or in a leather utensil;” our sages explain that this excludes coloured vessels. utensils or garments. The main practical significance of this statement is that wool or linen confer the wearer’s impurity only when they are in the original white colour. The rules applying to dyed wool garments also apply to dyed leather utensils.
Rashi on Leviticus
אדמדם — the deepest red (Sifra, Tazria Parashat Nega'im, Chapter 14 2).