Maybe useful for later, but I see some advantages.

wcag2(aa) seems to be a good and self explanatory function.

It has limitations though:

• it doesn't guarantee perceptual or AAA compliance
• transition snaps because contrast-color returns a discrete value and
• tie goes to white
• gradients and images are out
• transparent colors are composited first
• windows high contrast mode takes over. It is defined in https://www.w3.org/TR/css-color-adjust-1/#forced-colors-mode

The generated colors can be combined with other color functions.

I am still concerned more and more computation will be put on simple webpages.