Color Appearance of Object Colors in Peripheral Vision at Various Illuminance Levels

Abstract

The color appearance in peripheral vision was studied for chromatic object colors over a wide illuminance range from photopic to scotopic vision. Swedish NCS color samples with the existing maximum chromaticness at each of eight different hues were used for color stimuli in the experiment. The size of the stimulus was set at 2° of the visual field and the background was N2.5. The stimuli were presented horizontal and vertical meridians, and meridians inclined at angles of 45°. The illuminance level was set at six levels in the range from 0.01 lx to 1000lx. The evaluation method was to measure the chromatic, the white, and the black components, and the hue component of the stimuli. As a result, the chromatic component was found decreased with the increasing eccentricity, and the hues shifted toward yellow in the case of stimuli containing a yellow component and toward blue in the case of stimuli containing a blue component, when the illuminance level was decreased in the peripheral vision.