https://bugs.kde.org/show_bug.cgi?id=515431

            Bug ID: 515431
           Summary: Night Light below 1,100K raises the black level
    Classification: Plasma
           Product: plasmashell
      Version First master
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: Day/night schedule
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: 1.0

SUMMARY
Setting Night Light to below 1,100K (most visible with 1,000K) raises the
overall black level making it unusable especially on OLED displays at night. 

STEPS TO REPRODUCE
1. Turn on Night Light (Always on night light or Sunrise and sunset)
2. Set the temperature to 1,100K (subtle effect) or 1,000K (very intense on
OLED at night)
3. Apply

OBSERVED RESULT
The black level raises making a black wallpaper/theme gray. This affects
everything on the screen uniformly (as does Night Light). 

EXPECTED RESULT
The black level remains unchanged as the colors get warmer.

SOFTWARE/OS VERSIONS
Linux: Arch 6.12.68-1-lts (64-bit)
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0 
Qt Version: 6.10.2

ADDITIONAL INFORMATION
When HDR is turned on Night Light behaves correctly.

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