Color Combination Pairs of Achromatic Color for the Elderly

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Thitiporn Lertrusdachakul
Kanakarn Ruxpaitoon
Kasem Thiptarajan


Colors help in communicating information and emotions. But effects of aging on vision make difficulty in color discrimination and due to a lot of applications of achromatic color in everyday life, this research therefore focuses on the study of color pairs specific to achromatic color that are suitable for aging vision. A test set of 180 emotionally associated colors from the Color Image Scale were compared to 9 levels of gray in visual discrimination test of the elderly. The test was performed for both gray as the object color and the background color. The results of variation in difficulty of visual discrimination were then analyzed for each color. Finally, we summarize the color groups that can be clearly seen for the different types of grayscale color pairs: 2.white and white 4.shadow 5.highlight 6.shadow and highlight 7.all grayscale tone 8.all grayscale tone and black and white 9.all grayscale tone and shadow and highlight. The example of recommended color for the grayscale type 6 (shadow and highlight) is light blue with RGB value of 26,169,206. For the example of recommended color in the case of using with the grayscale type 8 (all grayscale tone and black and white) is orange with RGB value of 227, 109, 74. The summary of the recommended color groups for these nine grayscale color pairs will help to design the color related to achromatic color more appropriately for the elderly.

Article Details

How to Cite
T. Lertrusdachakul, K. Ruxpaitoon, and K. Thiptarajan, “Color Combination Pairs of Achromatic Color for the Elderly”, JIST, vol. 12, no. 2, pp. 42–53, Dec. 2022.
Research Article: Human-Computer Interaction (Detail in Scope of Journal)


United Nations, “Ageing,”. [Online]. Available: [Accessed: Apr. 16, 2022].

Population Reference Bureau, “Countries with the Oldest Populations in the World,”. [Online]. Available: [Accessed: Apr. 16, 2022].

R. Liutkeviciene, D. Cebatoriene, G. Liutkeviciene, V. Jasinskas, and D. Zaliuniene, “Associations between contrast sensitivity and aging,”Medicina (Kaunas),vol. 49, no. 6, pp. 273-277, 2013.

M. A. Jadkowski, “Understanding Recommended Color Contrast,”, Jan. 11, 2017. [Online]. Available: [Accessed Apr. 16, 2022].

World Wide Web Consortium, “Web Content Accessibility Guidelines (WCAG) 2.1,” 2018. [Online]. Available: [Accessed Apr. 16, 2022].

Adobe Color, “Contrast Checker,” [Online]. Available:[Accessed Apr. 16, 2022].

Institute for Disability Research, Policy, and Practice, “Contrast Checker,”[Online]. Available:[Accessed Apr. 16, 2022].

P. Pratumrat, “Effects of room illuminance on luminance contrast threshold on LCD for the elderly with cataract,” M. S. thesis, Chulalongkorn University, Bangkok, 2011.

Model Color Palette for Color Universal Design Working Committee, “Model Color Palette for Color Universal Design Guide Book,” 2018. [Online]. Available: [Accessed Apr. 16, 2022].

Google, “Dark Theme,”.[Online]. Available: [Accessed: Apr. 16, 2022].

Google, “Text Legibility,”.[Online]. Available: [Accessed: Apr. 16, 2022].

H. Nagumo, New Color Image Chart. Tokyo, Japan: Graphic-sha, 2016