The CSS4+ color class manage now perceptual colors !
I encourage you to use it and I thank Chris Lilley for creating this new standard.
You could see also color.js ( https://colorjs.io ), an implementation of this standard.
After 1500+ downloads since 2018, Perceptuel Colorpicker is now available on Microsoft Store.
This site will self-destruct on January 13, 2023 !