On Sep 21, 2004, at 8:33 AM, Rodger Whitlock wrote: > > I don't know if the CIE coordinates for the RHS color patches have > ever been worked out. > A quick Google search turned the following item. Maybe it can be found in someone's personal library or in a publicly accessible library. --Lee Poulsen Pasadena area, California, USDA Zone 9-10 ===================== A Contribution Toward Standardization of Color Names in Horticulture, Application of the Universal Color Language to the Colors of the Royal Horticultural Society's Colour Chart, by Robert D. Huse and Kenneth L. Kelly, Edited by Donald H. Voss. The American Rhododendron Society Publications Committee 1984. Although this is an old publication, it is worth knowing about. One of the tables lists the RHS Colour Chart numbers with their corresponding ISCC-NBS color names and numbers, Munsell notations, HCC colour names and numbers and CIE chromaticity coordinates (x, y) and Daylight Reflectance (Y).