Material Detail

Judicious choice of color for text and backgrounds of web and e-learning tools can increase the readability of on-screen text and have the added benefits of minimizing extraneous cognitive load and boosting learning retention. A review of empirical research on color and contrast identifies a set of recommendations for establishing luminance contrast between on-screen text and backgrounds that will inform instructional design and web development practices. Visual cueing, as an element of multimedia theory, and web page complexity also play important roles in maximizing readability. Web Accessibility Initiative (WAI) and Section 508 guidelines for making web pages usable by individuals with physical and/or visual impairments are not uniformly applied to current design practices; this review uses color blindness to as an example and recommends several online tools to select appropriate page background and text colors, two areas that receive limited attention in current WAI guidelines. Suggestions for future research on the intersection between color and contrast and how it can improve readability for all users, including individuals with visual impairments such as color blindness, and multimedia cognitive load theory are proposed.

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