Created attachment 137783 [details]
Selected botton

SUMMARY
On pressing button, when we are using a light background for it , for example light-green , plasma should have an option to set dark text separately , but currently it use light text and this is really unpleasant.
Even if we change bottom text color to dark it will change all variants in both select mode and unselect mode to dark which make them both dark and unreadable , there should be an option to set dark text when button pressed and its background is light while it doesn't makes affect to its normal unselcted mode.

As you can see in attached screenshot , 'Upload Scheme' button is in true readable form with dark background and white text when it's unselected , but when we select it , the text should change to dark to ease the read and prettiness but it stay on white and hard and unpleasant to read.

STEPS TO REPRODUCE
1. Go to System Setting > appearance > colors
2. Save As Breeze dark to change it.
3. Edit Color Scheme > Button > Change Normal Background to #000000 and Focus and Hover Decoration to a light color like green.

OBSERVED RESULT
Light text when selecting button which has light decoration accent.

EXPECTED RESULT
Text should change to dark , when button is selected and has light color as backgroud/accent

SOFTWARE/OS VERSIONS

Linux : Arch Linux
KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.81
Qt Version: 5.15.2 KDE Fork

ADDITIONAL INFORMATION