Bug 515431

Summary:	Night Light below 1,100K raises the black level
Product:	[Plasma] kwin	Reporter:	onemore.tweak381
Component:	night color	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	minor	CC:	kde, vlad.zahorodnii
Priority:	NOR
Version First Reported In:	6.5.5
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description onemore.tweak381 2026-02-02 20:05:22 UTC

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.