Bug 516061 - Temperature slider should have lower temperatures to the left and higher on the right
Summary: Temperature slider should have lower temperatures to the left and higher on t...
Status: RESOLVED INTENTIONAL
Alias: None
Product: systemsettings
Classification: Applications
Component: kcm_nightcolor (other bugs)
Version First Reported In: 6.5.5
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-15 22:29 UTC by Riccardo Robecchi
Modified: 2026-02-16 14:20 UTC (History)
2 users (show)

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Description Riccardo Robecchi 2026-02-15 22:29:14 UTC
SUMMARY
Currently, the temperature sliders for night and day temperatures show higher temperatures on the left hand side and lower temperatures on the right hand side. This is, however, quite confusing, as the temperatures are ordered contrary to the normal progression of numbers (which is left to right, at least in English and other Western languages/traditions). While I do understand that the slider is meant to symbolise the strength of the effect, the addition of the numbers and their ordering contrary to conventions becomes confusing.
The solution here would be to either keep the current arrangement but remove the numbers to make the slider a simple intensity control (which, however, is unadvisable as it removes precision) or to turn around the way the slider works, with higher temperatures on the right hand side.

STEPS TO REPRODUCE
1. Open the KCM

OBSERVED RESULT
Higher temperatures are on the left hand side of the sliders, lower temperatures are on the right hand side.

EXPECTED RESULT
Temperatures are ordered according to the normal ordering of numbers, and therefore with higher numbers being placed on the right hand side.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Endeavour OS (Arch Linux)
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2

ADDITIONAL INFORMATION
Comment 1 Oliver Beard 2026-02-16 14:20:48 UTC
I believe it makes sense for the slider to represent the strength of the effect, as 0% represents no change and 100% represents '(fully) on'. Removing the numbers to clarify that the sliders do not directly represent colour temperature would likely be objectionable as users might want to set specific values (perhaps for consistency with other systems).

This could be improved with a custom slider that does represent colour temperature, visually. This is unfortunately not practicable, so I will mark this as RESOLVED INTENTIONAL.