SUMMARY Changing the color scheme for KDE does not effect Kate. You have to manually select the color scheme for Kate through Settings > color scheme STEPS TO REPRODUCE 1. Open Kate notice look and feel 2. Open system settings and change color scheme (everything adheres to color scheme, e.g. Dolphin, Akregator, Kmail). 3. Kate is not following color scheme unless manually set. OBSERVED RESULT Kate sticks to color scheme set under Settings > Color scheme EXPECTED RESULT Kate follows the System Settings selected color scheme SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20200916 KDE Plasma Version: 5.19.5 KDE Frameworks Version: 5.73.0 Qt Version: 5.15.1 Kernel Version: 5.8.7-1-default
This will be fixed in 5.75, KTextEditor based applications like Kate will at least choose some matching dark or light theme. Thought individual colors still need to be configured there, as the global color schemes are not sufficient for that. But you will not get stuck with e.g. a white text editing area in some dark sourrounding.