have been calculated, in particular chroma
[Cab *, saturation or ‘color purity’, ranging from 0 for a sample completely unsaturated (i.e. a neutral gray, black or white) to 100 or more] and hue angle (hab, which units are in degrees, ranging from 0 for a sample completely unsaturated (i.e. a neutral gray, black or white) to 100 or more] and hue angle (hab, which units are in degrees