Incorrect conversion from color-mix to oklab

[ckoca]

Lightning CSS performs the following conversion:

Input:

body {
  background: color-mix(in oklab, #101010 85%, transparent);
}

Output:

body {
  background: oklab(17.3042% --7.45058e-9 1.49012e-8 / .85);
}

It appears that the second argument of the oklab function is incorrect, as it includes a double negative sign.

You can observe this behavior in the Lightning CSS playground.

[lfesp]

I am facing this same issue, which is breaking compatibility for my project for Tailwind v3 -> v4. This seems to be the consequence of the incorrect assumption that negative numbers will have their string representation prefixed by "-0"

[titanve]

Any progress on this issue? This is also affecting my upgrade from TailwindCSS ver3 to ver4. Thanks!

[lfesp]

^ bump -- I have tested on my fork for the past weeks, my fix for the issue seems stable and does not impact performance.

[titanve]

Hi @lfesp
What is your fix for the issue?
Would you please share it? Thanks!

Is it this one?
lfesp@0afd5d6

[lfesp]

@titanve Yes, that is the correct commit and I have opened a PR to resolve the issue #901

[titanve]

@lfesp thank you so much!

[titanve]

@lfesp your PR was merged 🎉

[devongovett]

Thanks, and sorry for the delay. I'll do a patch release later today.