ISO 11664:2008 specifies the method of calculating the coordinates of the CIE 1976 L*a*b* colour space including correlates of lightness, chroma and hue. It includes two methods for calculating Euclidean distances in this space to represent the perceived magnitude of colour differences.
ISO 11664:2008 is applicable to tristimulus values calculated using colour-matching functions of the CIE 1931…