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Color constancy indices (±1 SE) for Mondrian-like patterns consisting of Munsell and natural reflectance spectra under two different illuminant changes. Daylights are specified by their correlated color temperatures. Data for nine normal trichromats and five protanopes.
| Trichromats | Protanopes | ||
|---|---|---|---|
| 25000 – 6700 K | Munsell | 0.77 (0.18) | 0.41 (0.04) |
| Natural | 0.76 (0.06) | 0.57 (0.11) | |
| 4000 – 6700 K | Munsell | 0.79 (0.12) | 0.52 (0.13) |
| Natural | 0.75 (0.05) | 0.72 (0.11) | |
