Introductory information about the space, terms, existing standards, and theory:
- https://uxmovement.com/buttons/the-myths-of-color-contrast-accessibility/
- https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html
- https://poynton.ca/PDFs/GammaFAQ.pdf
- https://www.w3.org/TR/WCAG20/#contrast-ratiodef
- https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast7.html
- https://en.wikipedia.org/wiki/Luma_(video)
- https://en.wikipedia.org/wiki/Relative_luminance
- https://en.wikipedia.org/wiki/Rec._709
These links deal more with the implementation (code) that I referenced when building this perceptual color comparison tool:
- https://github.com/Qambar/color-contrast-checker/blob/master/src/color-contrast-checker.js
- https://stackoverflow.com/questions/596216/formula-to-determine-brightness-of-rgb-color
- https://stackoverflow.com/a/596241/203130
- https://stackoverflow.com/a/56678483/203130
Finally, these links start to get into research into this space by Andrew Somers that deals not just with the simplified problem of color and contrast in the relatively pure environment of a color space, but within the messy real world where a person's environment, context, visual deficiencies, and equipment all intersect:
@Myndex Thank you! And thank you for all of your effort on what has become APCA!