[v4.0.0-alpha.28] The `neutral` color doesn't work well with `color-mix` for transparency

[benjamincanac]

What version of Tailwind CSS are you using?

v4.0.0-alpha.28

What build tool (or framework if it abstracts the build tool) are you using?

Nuxt

What version of Node.js are you using?

v20.13.1

What browser are you using?

Chrome

What operating system are you using?

macOS

Reproduction URL

https://ui3.nuxt.dev/getting-started

Describe your issue

It occurs when using --color-neutral-* color with a transparency: bg-neutral-900/75.

The issue might be in the definition of the color:

--color-neutral-900: oklch(0.205 0 none) -> --color-neutral-900: oklch(0.205 0 0)

[sandros94]

Doesn't appear to be OS specific (I tested also on Windows and Android), mostly affects Chromium-based browsers. Firefox and forks aren't affected

[benjamincanac]

Might be a duplicate of #14732!