[v4] Implement an enhanced version of color-mix

[wxul]

I've noticed that version 4 uses color-mix to implement color transparency

https://tailwindcss.com/docs/color#changing-the-opacity

text-blue-600/75 => color: color-mix(in oklab,var(--color-blue-600)75%,transparent)

Is the Tailwind team interested in enhancing this syntax to implement a more robust color-mix?

Example:

text-blue-600/75/white => color: color-mix(in oklab, var(--color-blue-600) 75%, var(--color-white))
text-blue-600/25/amber-500/25 => color: color-mix(in oklab, var(--color-blue-600) 25%, var(--color-amber-500) 25%)