Bug 502645 - Color selected by any KDE colorpicker is slightly darker than actual color
Summary: Color selected by any KDE colorpicker is slightly darker than actual color
Status: RESOLVED DUPLICATE of bug 491633
Alias: None
Product: kwin
Classification: Plasma
Component: colour-management (other bugs)
Version First Reported In: 6.3.4
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-04-10 15:05 UTC by Andrey Voeiko
Modified: 2025-06-02 13:07 UTC (History)
4 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
Color picker (Wayland) (265.18 KB, video/x-matroska)
2025-04-10 15:05 UTC, Andrey Voeiko
Details
Color picker (X11) (341.40 KB, video/x-matroska)
2025-04-10 15:06 UTC, Andrey Voeiko
Details

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Description Andrey Voeiko 2025-04-10 15:05:19 UTC
Created attachment 180152 [details]
Color picker (Wayland)

SUMMARY
Color selected by colorpicker is slightly darker than actual color.

STEPS TO REPRODUCE
1. Login to a Wayland session.
2. Use any color picking functianality (i.e. the widget) in a KDE app.
3. Compare to the actual color.

OBSERVED RESULT
Color got from the color picker is slightly darker than the color from the screen (see attachment).

EXPECTED RESULT
Colors should be the same.

SOFTWARE/OS VERSIONS
Linux: Arch Linux
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION
I am absolutely shure that the issue is in KDE, not in kitty (see attachment) because:
A. The problem disappears in X11 session (see attachment in my comment).
B. I noticed the problem when I edited my colorscheme's header color to match kitty's background color by systemsettings' builtin colorpicker. When I took the correct color from kitty's config, colors matched.

First guess is that the cursor's shadow affects the picked color, but I have no idea how the color is actually got.
Comment 1 Andrey Voeiko 2025-04-10 15:06:13 UTC
Created attachment 180153 [details]
Color picker (X11)
Comment 2 Andrey Voeiko 2025-04-10 15:07:11 UTC
I mentuined the seccond attachment in a comment, but it is actually in the attachments section.
Comment 3 Nate Graham 2025-04-11 18:25:11 UTC
Are you using Night Color or an ICC profile?
Comment 4 Andrey Voeiko 2025-04-12 15:53:30 UTC
(In reply to Nate Graham from comment #3)
> Are you using Night Color or an ICC profile?

I don't use ICC. Switching Night Color on or off has no effect.
Comment 5 Zamundaaa 2025-06-02 13:07:40 UTC

*** This bug has been marked as a duplicate of bug 491633 ***