[okular] [Bug 451651] New: "Dark color" should be changed to "Black" and "Light color" to "White" under "Okular setting Accessibility - Change dark and light colors'

[cipricus]

https://bugs.kde.org/show_bug.cgi?id=451651

            Bug ID: 451651
           Summary: "Dark color" should be changed to "Black" and "Light
                    color" to "White" under "Okular setting Accessibility
                    - Change dark and light colors'
           Product: okular
           Version: 21.12.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: cipricus at gmail.com
  Target Milestone: ---

Created attachment 147581
  --> https://bugs.kde.org/attachment.cgi?id=147581&action=edit
the setting discussed here

Within the discussion
(https://invent.kde.org/graphics/okular/-/merge_requests/587#) of my previous
bug report (https://bugs.kde.org/show_bug.cgi?id=451573) I was convinced that I
was wrong, but the same line of argument that has convinced me imposes a
further clarification.

Those settings are not about foreground and background, nor about text or
images.

Any text or image would be treated as a monochrome one (with degrees of black
and white), "Dark color" setting will replace black, "Light color" setting will
replace white. For example, if "Dark color" is set to red and "Light color" is
set to purple, the proportion of red and purple will follow the initial
proportions of black and white from the monochrome base.

That means that "black" should be used for "dark" and "white" for "light" as
more adequate naming of those settings,  because that's what is happening in
fact: the color selected under "light color" setting (purple in example) will
100% replace light color only if that is fully white, otherwise (if it has some
degree of black) it will mix it with the color set under the "dark color"
setting (red in example)!
The advantage of that would be to add more clarity: dark and light are relative
terms, black and white correspond exactly to what is happening here.

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