"Based on a view to examining the change in the perceptive gamut of the color with age-changings, we took up the most basic colors, i.e., red (28 colors), yellow (29 colors), green (30 colors) and blue (32 colors), and each color was comparatively examined by the classifications of age-group, regarding what about the colors which the individuals recognize as red and how about others do as yellow, green and blue. The results revealed that color-judging capability was decreased with aging, that great differences in color gamut especially according to the age were remarkably noted for three colors other than red and that colors defined by JIS as general colors were made considerable gaps between those grasped actually by individuals. The results of multiple regression analysis also revealed that red and blue were influenced most by lightness and excitation purity, respectively for each age, that yellow was influenced most by excitation for younger age, but by dominant wavelength with aging, and that green was influenced largely by dominant wavelength with aging in all-through with high coefficients of excitation purity and lightness in all age-group classifications.
