Visibility Rating of Achromatic Web-Safe Color Using Weber-Fechner's Law

概要

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Web page visibility gained importance due to the rapid dissemination of the World Wide Web. Since combinations of foreground and background colors are crucial in providing good visibility and an investigation of all possible color combinations is extremely difficult to conduct, a model or empirical formula for estimating color combination visibility is needed. In this study, a visibility rating method of color combinations is proposed. The visibilities of several web-safe color combinations were examined using a psychological method, a paired comparison. Twenty students with normal color sensations ranging from ages 19 to 26 were recruited. They were instructed to look at two different colored rings simultaneously on the same background and identify which one enabled them to see better. When examining the relationship between the psychological rankings of color combinations and visual sensations, the visibility of each color combination was first scored by Thurstone's paired comparisons technique. The visual sensations were then deduced by applying Weber-Fechner's law to the luminance of the stimuli. We found that color combination ranking has a positive monotonic relationship with sensation magnitude. This indicates that the visibilities of color combinations can be rated by applying Weber-Fechner's law to the luminance pairs of foreground and background colors.
バイオメディカル・ファジィ・システム学会の論文