Add support for #rgba and #rrggbbaa CSS colors

Site Outreach Issue #11014509


Iván S.
Feb 21, 2017
This issue is public.
Standard affected
CSS Color Module Level 4

Reported by 2 people

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Steps to reproduce

Feature request: please add support for parsing CSS colours in #rgba and #rrggbbaa notations, in addition to the current #rgb and #rrggbb notations.

These notations are defined in the CSS Color Module Level 4 ( ) and already supported by Chrome 52, Firefox 49 and Safari 9.1.


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    Comments and activity

    • Microsoft Edge Team

      Changed Status to “Not reproducible”

    • Thank you for taking your time to provide us your
      feedback. This feedback falls under a feature or design change request. Please
      login to our Feedback Hub app (Steps below) and feel free to file your
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      Use the Feedback Hub app to tell us which features you
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      Best regards,

      The MS Edge Team

    • I don’t think this is a feature request – this is a lack of implementation of CSS Color 4. See and, as Edge fails these relevant tests.

    • Microsoft Edge Team

      Changed Status from “Not reproducible” to “Site Outreach”

    • Thanks for filing, our bug system is only to track bugs in current implementations. This is a feature request to update the tokenizer to recognize and map the additional hex values. To add support for this feature please vote for it on our uservoice page here:–rrggbbaa-and-rgba-color-notation-support

      Thank you.

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