The present disclosure provides a contact lens comprising a first colourant which is a blue-blocking colourant having an absorption maximum (λ.sub.max) in the range of from 415 nm to 455 nm and a second colourant, wherein the second colourant is a polymerizable dye having an absorption maximum (λ.sub.max) in the range of from 470 nm to 600 nm, and optionally also comprising a third colourant which is a colourant having an absorption maximum in the range of from greater than 600 nm to 800 nm. A method of making the lens is also provided.

A method for producing 1,4-diphenylamino-5,8-dihydroxyanthraquinone provides a dye with high colour strength and excellent brilliance for colouring plastics.

The present disclosure provides a contact lens comprising a first colourant which is a blue-blocking colourant having an absorption maximum (.sub.max) in the range of from 415 nm to 455 nm and a second colourant, wherein the second colourant is a polymerizable dye having an absorption maximum (.sub.max) in the range of from 470 nm to 600 nm, and optionally also comprising a third colourant which is a colourant having an absorption maximum in the range of from greater than 600 nm to 800 nm. A method of making the lens is also provided.