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Something, especially a dye, pigment, ink, or paint, that colors or modifies the hue of something else.
Of or being a subtractive primary color.
(Dyeing) any substance that imparts colour, such as a pigment, dye, or ink; colouring matter
col•or•ant(ˈkʌl ər ənt)
something used as a coloring matter; pigment; dye.
[1880–85; < French, present participle of colorer < Latin colōrāre to color]