chr package:colour

Constructs a colour from the given Chromaticity and luminance.
Change the type used to represent the chromaticity coordinates.
Returns the CIE little x, little y, little z coordinates for the 2° standard (colourimetric) observer.
Returns the CIE little x coordinate for the 2° standard (colourimetric) observer.
Returns the CIE little y coordinate for the 2° standard (colourimetric) observer.
Returns the CIE little z coordinate for the 2° standard (colourimetric) observer.
Constructs Chromaticity from the CIE little x, little y coordinates for the 2° standard (colourimetric) observer.