A contrast colour selection scheme for WCAG2.0-compliant web designs based on HSV-half-planes
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Original versionSandnes, F.E. & Zhao, A. (2015). A contrast colour selection scheme for WCAG2.0-compliant web designs based on HSV-half-planes. I S. Kwong (Red.), IEEE SMC 2015: IEE International Conference on Systems, Man, and Cybernetics. October 9-12, 2015, Hong Kong (s. 1233-1237 ).
Abstract—Sufficient colour contrast between text andbackground is necessary for the text to be readable. WCAG2.0defines contrast guidelines that ensure web pages can be read bypeople with a visual acuity of as low as 20/80. However, theWCAG2.0 specification is hard to understand for web-designersand they often perform colour checks after the design is finishedusing colour contrast calculators. It is then often too late to makesignificant changes to the design. This paper proposes a newcolour selection scheme that integrates contrast constraints intothe main design phase by only allowing designers to select colourpairs that contains sufficient contrast. The mechanism iscompatible with the colour harmony systems commonly used bydesigners. The tool gives designers an easily perceivable overviewof the design space of available colours. The paper brieflydescribes a prototype of a colour picker tool that implements theproposed scheme