https://bugs.kde.org/show_bug.cgi?id=479749

            Bug ID: 479749
           Summary: [accessibility] Enabling "Colorblindness Correction"
                    Desktop Effect make the screen almost all white
                    instead.
    Classification: Plasma
           Product: kwin
           Version: 5.92.0
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: effects-various
          Assignee: kwin-bugs-n...@kde.org
          Reporter: dmatteo...@gmail.com
  Target Milestone: ---

Created attachment 164869
  --> https://bugs.kde.org/attachment.cgi?id=164869&action=edit
Image of screen after setting change

SUMMARY
The screen after changing that setting is almost completly white but it is only
a graphical problem, as in the system still work as normal.
It became whiter as time goes on so, so maybe it is some kind of multiplicative
effect where the effect is applied on the same image multiple times.


STEPS TO REPRODUCE
1.  Go to Window Managment -> Desktop Effects
2. Enable Colorblindness Correction
3. Click apply 
* This apply to both 5.92.0 and today's master branch.

OBSERVED RESULT
The screen is almost completly white. When enabling it become more and more
white.
It is still possible to disable it by entering overview, understanding where to
click (or to tab to) and disable colorblindess and click apply again.

EXPECTED RESULT
The screen should have slightly different colors.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.92.0
KDE Frameworks Version: 5.248.0
Qt Version: 6.7.0
Kernel Version: 6.7.0-arch2-1 (64-bit)
Graphics Platform: Wayland
Graphics Processor: Intel


ADDITIONAL INFORMATION
I think it is a major bug because it could make it almost unusable and it is
diffult to disable it.

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