[Webkit-unassigned] [Bug 241576] New: CSS variable not accepted as alpha value in modern CSS `rgb()` function for ::marker color

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241576

            Bug ID: 241576
           Summary: CSS variable not accepted as alpha value in modern CSS
                    `rgb()` function for ::marker color
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: brandon at dreamthinkbuild.com

Created attachment 460218

  --> https://bugs.webkit.org/attachment.cgi?id=460218&action=review

screenshot of bug

The source of this bug can be found here:
https://github.com/tailwindlabs/tailwindcss/issues/8610

Isolated example: https://codepen.io/brandonmcconnell/pen/jOZXdzg/f089181395b1ffd8812a16e6b5c96e7b?editors=1100

When using an opacity value from a CSS variable as the alpha channel value in an `rgb()` **for a ::marker pseudo-element's color**, neither the color nor the opacity values are rendered.

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