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Re: 1.4.1 use of color for state indicator

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From: Steve Green
Date: Mar 9, 2020 6:50AM

Luminance isn't colour either. Every definition of colour I can find states that colour is the combination of hue and luminance. All the research into colour perception involves both hue and luminance, and the WAI colour contrast algorithm is based on both.

If the SC does not say what its authors meant it to say, then it needs to be rewritten. In the meantime, I do not see any justification for ignoring luminance. FWIW, I would argue against any change in the SC that equates hue to colour.

Steve