[wp-trac] [WordPress Trac] #55962: Upgrade `sanitize_hex_color()` to CSS Color Level 4

[WordPress Trac]

#55962: Upgrade `sanitize_hex_color()` to CSS Color Level 4
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 Reporter:  anrghg                               |       Owner:  (none)
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  Future
                                                 |  Release
Component:  Formatting                           |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  needs-patch needs-unit-tests dev-    |     Focuses:  css
  feedback                                       |
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Comment (by pentatonicfunk):

 there is also `rest_parse_hex_color`

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Ticket URL: <https://core.trac.wordpress.org/ticket/55962#comment:9>
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