Impossible to set black background

[woj-tek]

Checklist

• I can reproduce the bug with the latest versions.
• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs), in the README and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report may get dismissed otherwise.
• This issue contains only one bug.

Affected Android/Custom ROM version

Android 14 / OneUI 6.0

Affected device model

Samsung Galaxy A52s 5G

How did you install the apps?

F-Droid / IzzyOnDroid

Which apps are affected?

Clock

Steps to reproduce the bug

1. Go to settings (cog icon)
2. Choose "Change colours" and then select "Dark" theme
   3 Choose "background" colour and set it to black ( #000000 )

Expected behavior

I should have app with black background

Actual behavior

After confirming the colour app fallbacks to "Light / dark automatic" theme with greying background.

The steps works in Messages app just fine.

Screenshots/Screen recordings

No response

Additional information

Followup to FossifyOrg/Clock#76