Usage
XYZ2RGB(XYZmatrix, illuminant = "D65", observer = 2, RefWhite
= XYZperfectreflectingdiffuser, RGBModel = "sRGB",
RefWhiteRGB = whitepointsRGB, gamma = NA,
RefWhiteIllum = XYZperfectreflectingdiffuser, CAT =
"Bradford", CATarray = ChromaticAdaptation)