RT Journal Article T1 The use of metamers to compare the color vision of observers A1 Ezquerro Rodríguez, José Miguel A1 Carreño Sánchez, Fernando A1 Zoido Chamorro, Jesús Manuel A1 Bernabeu Martínez, Eusebio AB In this research we compare the colorimetric behavior of several observers. For color centers recommended by CIE we have produced large sets of spectral distributions, which are metameric for the CIE 1931 standard observer. For each one of the color centers, we compare the clouds of chromaticity coordinates with the chromaticity thresholds. We define a parameter that provides a quantitative measure of the interobserver variability. This parameter is used to arrange the observers by their degree of likeness. A similar procedure has been used to compare two real observers. It is shown how there is no reciprocity between the colorimetric behavior of two real observers PB John Wiley & Sons, Inc. SN 0361-2317 YR 2001 FD 2001-08 LK https://hdl.handle.net/20.500.14352/59225 UL https://hdl.handle.net/20.500.14352/59225 LA eng NO © John Wiley & Sons, Inc.The authors are especially endebted to Dr. J. A. Martínez, Dr. E. Hita, and Dr. M. Melgosa at Departamento de Óptica of Granada University for their continual advice and help. They also want to express their gratitude to the anonymous referees who comments helped us to improve the article. DS Docta Complutense RD 6 abr 2025