https://bugs.kde.org/show_bug.cgi?id=406302

            Bug ID: 406302
           Summary: window decorations colors on 30-bit colour depth
                    (10-bi/channel) displays are wrong (garbled)
           Product: frameworks-plasma
           Version: 5.56.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: libplasma
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

SUMMARY
When the display is set to 30-bit colour depth (10-bi/channel) such as shown in
the xorg.conf below, colours of teh window decoration are wrong (garbled) (see
attachment.

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    30
    SubSection     "Display"
        Depth       30
    EndSubSection
EndSection


STEPS TO REPRODUCE
1.  Need a wide gamut monitor. Change the screen section in xorg.conf as shown
above to enable 30 bit color depth on the display device/monitor
2. restart X 
3. Observe the window decoration (title bar & borders) colors, which are wrong,
the colors displayed in the window are good. 



OBSERVED RESULT

Wrong colours of the window decorations

EXPECTED RESULT

Good colours of the window decorations as in the rest of the window.
SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Open Suse Leap 15.1  
(available in About System)
KDE Plasma Version: 5.15
KDE Frameworks Version: 5.56
Qt Version: 

ADDITIONAL INFORMATION

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