Fifty‐five metameric sample pairs were prepared using computer‐predicted recipes from six different colour centres using cotton knit fabric. The colour difference of each sample pair was measured spectrophotometrically and was assessed visually by a panel of observers against a grey scale under three illuminants: reference illuminant D65, test illuminant A and TL84. In general, there was a positive agreement between observers' assessments although there was some variation due to the spread of ages. The results of illuminant‐specific special indices, CMC(2:1), were better than others, which included CIELAB, CMC(1:1), CIE94(1:1:1) and CIE94(2:1:1). In general, the performance of these five special indices was acceptable. The results of illuminant‐independent general indices failed to show any significant correlation. The effect of residual colour difference under the reference illuminant affected the performance of the special indices to a certain degree, but this was not true of general indices.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.