Crossword Genius

Turns blue, say (4)

Ross

I believe the answer is:

dyes

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">turns blue say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for dyes that I've seen before include "Many a pigment" , "turns green, possibly" , "Stains" , "Substances for staining or colouring" , "Colouring materials" .)

I've seen this clue in the Newsday.com, The Chronicle of Higher Education and the Newsday.
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