[okular] [Bug 488313] New: Text Highlighting: Improved Color Palette

[Leonard Mada]

https://bugs.kde.org/show_bug.cgi?id=488313

            Bug ID: 488313
           Summary: Text Highlighting: Improved Color Palette
    Classification: Applications
           Product: okular
           Version: 23.08.5
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: leo.mada at syonic.eu
  Target Milestone: ---

SUMMARY
The color palette used for text highlighting could be improved. Use less
saturated colors for text highlighting.

STEPS TO REPRODUCE
1. Open pdf (text on white background), e.g. scientific articles
2. Highlight some words

OBSERVED RESULT
Default color palette is too strong.


EXPECTED RESULT
Default color palette for highlighting should be less saturated:
- use colors where min(R,G,B) >= 0.4 to 0.5, where each (R,G,B) channel is
between 0 and 1;
- e.g. a pale green (#7df066): min(R,G,B) = 102/255 = 0.4 (Note: min/max is
even slightly higher);

As opposed to this, the color palette for text-annotations should have strong
colours with min(R,G,B) <= 0.4 (or 0.5).


SOFTWARE/OS VERSIONS
Windows: 10

ADDITIONAL INFORMATION
Okular should offer a "weaker" (less saturated) color pakette for highlighting
text in pdf documents (e.g. scientific articles).

Other useful features would be to export and import the custom colors (which I
use as the main palette for highlighting). However, selecting a custom color
involves a few more clicks: it would be preferable to have a different default
palette when highlighting text.

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