User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

1. Apply a custom theme that popup and popup_highlight are opposite colors.
   e.g.
   "theme": {
   "colors": {
   "popup": "white",
   "popup_text": "black",
   "popup_highlight": "black",
   "popup_highlight_text": "white"
   }
   }

2. Focus address bar and hovering over Quick actions.

Actual results:

The text of Quick actions is not visible because the text and the background are in the similar color.

Expected results:

The text of Quick actions is visible.

The Bugbug bot thinks this bug should belong to the 'Firefox::Theme' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

The severity field is not set for this bug.
:dao, could you have a look please?

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Hello, can you please attach the file for theme that you used? Thank you.

I was able to reproduce the issue using the attached xpi file on Win10x64 using Nightly 106.0a1(20220913092817). Marking issue as new so that developers can have a look. Thank you.