No background color edits. No color palette selection.

LibreOffice Calc (Debian). ‘Format cells …’ function - no background color edits, no color palette selection.
Tools>Options - no color editor! What happened? Is it possible?

Test whether LibreOffice user profile is causing the issue:

  • Start LibreOffice
  • Restart in Safe Mode using Help -> Restart in Safe Mode and confirm the restart using button: Restart
  • Archive your profile expanding Advanced (click on the word Advanced right above Help button) and click Archive User Profile button
  • Click button Continue in Safe Mode
  • Open a file and test whether the problem is gone

If the problem is gone while running in LibreOffice **Safe Mode**, most probably you user profile is corrupt and you need to reset to factory settings (could be also done via `Help -> Restart in Safe Mode`; carefully read the option in the dialog appearing when starting safe mode)
(May be you are comparing functionality of older releases - and is such older release - with your experience on more recent versions)