the visual perceptual property corresponding in humans to the categories called red, green, blue and others

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How to find an accessible color by changing lightness only?

Is the following hypothesis true? For any given color: { Hue, Saturation, Lightness_1 } there exists: Lightness_2 such that the contrast ratio between: { Hue, Saturation, Lightness_1 } and ...
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Accessibility (color contrast) of report inappropriate function

I'm looking into color contrast issues at present, and have noticed a pattern where 'report inappropriate content' flags seem to all fail AA compliance. I wonder if the flag was targeted via ...