Correlate for Lightness in Terms of CIE Chromaticity Coordinates and Luminous Reflectance*

This is a report on a side-line experiment of the OSA Committee on Uniform Color Scales. It gives new data on L/Y ratios in terms of CIE chromaticity coordinates, based on observations made by seventy-six observers on forty-three colored ceramic tiles. The mean results are given in tabular and graphical form and compared with similar results obtained previously by other investigators.