We studied shift in modes of color appearance for colored lights of 10 cd/m²surrounded surrounded by achromatic stimuli of various luminances (0–30 cd/m²).The subject estimated the magnitude of modes of color appearance. The results show that modes of color appearance for equalluminance colored lights vary with their chromaticities. Saturated stimuli in reddish and blueish regions tend to appear in the aperture color mode. We also measured the brightnessluminance ratio for the same colored lights with the surround of 10 cd/m². It is obviously shown in these results that shift in modes of color appearance for colored lights are related to their brightness.