css.types.color.color-mix - Add support data for optional colorspace argument

What type of issue is this?

Missing compatibility data

What information was incorrect, unhelpful, or incomplete?

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values/color_value/color-mix#browser_compatibility

What browsers does this problem apply to, if applicable?

No response

What did you expect to see?

https://webkit.org/blog/17640/webkit-features-for-safari-26-2/#:~:text=Previously%2C%20developers%20were,oklab%2C%20magenta%2C%20pink).

The compat data for color-mix(red, green) as a syntax (without the colorspace) is missing. It is only supported in Safari 26.2 and Firefox Nightly

Did you test this? If so, how?

.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

https://webkit.org/blog/17640/webkit-features-for-safari-26-2/#:~:text=Previously%2C%20developers%20were,oklab%2C%20magenta%2C%20pink).

https://bugzilla.mozilla.org/show_bug.cgi?id=2002148

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values/color_value/color-mix

MDN metadata

Start at the css.types.color.color-mix entry used by the linked MDN page; check the WebKit Safari 26.2 note and Firefox bug 2002148. Update the compatibility data for color-mix(red, green) without a colorspace, with support limited to Safari 26.2 and Firefox Nightly, then validate the data.