Created attachment 129102 [details]
Screenshot showing the colours and text

SUMMARY
The lack of contrast for the default Breeze selection text colours for the ‘positive’ and ‘neutral’ styles with coloured backgrounds makes the text extremely hard to read. This is also true, to a lesser extent, for the ‘negative’ and ‘visited’ style with a coloured background and for the ‘positive’ style for a normal (selection) background.

STEPS TO REPRODUCE
1. Open System Settings.
2. Go to ‘Colors’.
3. Select ’Breeze’.
4. Click the hard-to-spot pencil button on the ‘Breeze’ preview.
5. Select the ‘Colors’ tab.
6. Change ‘Color set’ to ‘Selection’.

OBSERVED RESULT
See attached screenshot. For the second row of colour previews, the ‘positive’ and ‘neutral’ text is very hard to read. The ‘negative’ and ‘visited’ text is also hard to read. For the first row, the ‘positive’ text is hard to read.

EXPECTED RESULT
All text should have sufficient contrast to be easily readable.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20200604
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.15.0
Kernel Version: 5.6.14-1-default
OS Type: 64-bit

ADDITIONAL INFORMATION
See W3C’s accessibility guidelines for colour contrast for text: https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html