Color changers (4)

I think it could be either:

Which length description are you looking for?:

dyes

'color changers' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for dyes that I've seen before include "Stains" , "Many a pigment" , "Colours (fabric)" , "Colour" , "Colouring materials" .)

I've seen this clue in the USA Today and the Universal.

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