Uniform Colour Space Based on the CMC(l:c) Colour-difference Formula

The CMC(l:c) colour-difference formula agrees more closely with visual assessments than does the CIE L*a*b* formula, but hitherto there has been no associated ‘uniform colour space’. A new colour space similar in form to CIE L*a*b* space has been derived in which distances agree closely with the corresponding deltaE(CMC) values. The new space was extensively tested using real and hypothetical pairs of samples. The new space represents a substantial improvement over CIE L*a*b* space with respect to uniformity; its form is similar to CIE L*a*b* and so is easy to use