Draft: Bug 41659: Add canonical color definitions to base-browser

Merge Info

• Related Issues

  • #41659 (closed)

• Upstream Merging

  • Merge to base-browser - typically for !fixups to patches in the base-browser branch, though sometimes new patches as well
    • NOTE: if your changeset includes patches to both base-browser and tor-browser please please make separate merge requests for each part

• Issue Tracking

  • Link resolved issues with appropriate Release Prep issue for changelog generation

Change Description

This is a backport of !561 (closed) . We'll need the base-browser patch ( fae10a8d ) for Sponsor 131. I'm doing a local test build now to make sure I backported this right.