Changes color, perhaps (4)
I believe the answer is:
dyes
(Other definitions for dyes that I've seen before include "Stains" , "turns green, possibly" , "Substances for staining or colouring" , "Colour" , "Colours (fabric)" .)
I believe the answer is:
dyes
(Other definitions for dyes that I've seen before include "Stains" , "turns green, possibly" , "Substances for staining or colouring" , "Colour" , "Colours (fabric)" .)