[wp-trac] [WordPress Trac] #49610: Twenty Twenty: Block editor inserter is missing the '+'

[WordPress Trac]

#49610: Twenty Twenty: Block editor inserter is missing the '+'
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 Reporter:  nrqsnchz                 |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  5.5
Component:  Bundled Theme            |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  needs-testing has-patch  |     Focuses:  css
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Comment (by Joen):

 Thank you for being mindful of that @poena! The gutenberg plugin has
 built-in support for dark backgrounds, and a theme may register that it
 uses a dark editor style using this function call:
 https://developer.wordpress.org/block-editor/developers/themes/theme-
 support/#dark-backgrounds

 Doing so ensures that not just the inserter plus, but indeed all UI
 including borders and placeholder text remains legible in dark
 backgrounds.

 I sense that the customizer may be involved, and that some of the
 discussion outlined in https://github.com/WordPress/gutenberg/issues/18571
 is relevant here. Nevertheless, it does suggest TwentyTwenty is doing
 something wrong when it's re-coloring editor UI, this should not be the
 responsibility of themers.

 Do you have any suggestions on how to best proceed?

 After this comment, I'll attach a couple of screenshots of Gutenberg with
 the dark-editor-style function call applied.

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Ticket URL: <https://core.trac.wordpress.org/ticket/49610#comment:11>
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