[Webkit-unassigned] [Bug 197556] New: CSS conic-gradient Does Not Render All Colour Parameters

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197556

            Bug ID: 197556
           Summary: CSS conic-gradient Does Not Render All Colour
                    Parameters
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: reuben.eggar at me.com

Created attachment 368920

  --> https://bugs.webkit.org/attachment.cgi?id=368920&action=review

Safari Left; Chrome Right - showing inaccurate blends between colours

When setting 'background: conic-gradient(#f00, #ff0, #0f0, #0ff, #00f, #f0f, #f00)', the gradient is not rendered correctly. This can be seen between green (#0f0) and blue (#00f), where there should be the colour #0ff. In Chrome this is clearly visible, and confirmed rgb(1, 255, 255) ≈ the correct value of rgb(0, 255, 255). In Safari (both the latest Technology Preview, and iOS 12.2 16E227) #0ff is not rendered, nor any approximately accurate colour. The same seems to occur throughout the conic-gradient.

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