Colored leather and garments do not become tamei with negaim. Houses, regardless of their color, become tamei with negaim, these are the words of R’ Meir. R’ Yehudah says: Leather is like houses. R’ Shimon says: Those colored naturally [lit., by heaven] become tamei; those [dyed] by man do not become tamei.

A garment whose warp is colored and its weft is white, [or] its weft is colored and its warp is white, is always [judged] according to its appearance. Garments become tamei when greenest of the greens or when reddest of the reds. [If] it was deep green and spread deep red, [or] deep red and spread deep green, it is tamei. [If] it changed and expanded [or] changed and did not expand, it is as if it did not change. R’ Yehudah says: It should be examined anew.