A new gamut [1] to represent object colours was developed by the authors. Its boundary is defined by CIELAB L*, Cab* and hab under D50/2° conditions. This paper describes an extension of this colour gamut to be reflectance based. Examples are given to illustrate the advantages to use spectral based rather than colorimetric based colour gamut.
C.J. Li, C. Li, M. R. Luo, M. Pointer, "A Colour Gamut Based on Reflectance Functions" in Proc. IS&T 15th Color and Imaging Conf., 2007, pp 213 - 217, https://doi.org/10.2352/CIC.2007.15.1.art00040