Based on the characteristics of color visibility in the elderly as they age, this study examines the role that color can play in helping the elderly lead more comfortable daily lives. In this study, based on a comparison of white and black backgrounds by setting the lightness to 5.0 or higher, we hypothesized that colors would be more easily distinguished on a black background with a large difference in lightness. The color discrimination (i.e., identification) ability of the elderly declines with age due to the cloudiness and yellowing of the lens of the eye. One of the most difficult tasks for the elderly in their daily lives is to distinguish the colors of medicines they take. Therefore, in this study, elderly people were used as experimental participants to explore the color legibility and color discrimination of tablet colors. They were presented with one of 74 tablet color card stimuli which were cut from PCCS cards and asked to answer by number from a list of tablet color samples the color they thought was the same as the tablet color. The participants in the experiment were 20 elderly men and women in their 70s to 90s (mean age 80.8 years) and 8 young women in their 20s (mean age 21.8 years). The results were as follows. First, colors with medium lightness and high saturation, such as vivid and bright tones, are desirable. Second, eight specific colors are desirable: white (w), yellow (p8), green (lt12), yellow-green (p10), blue (b18, sf18), red (v4), red- purple (p24), and violet (sf20). In conclusion, these can be drawn on as suggestions for colors that are easy for the elderly to identify. 45 ■■■■46
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