Released at the end of last week, Action Launcher 42 comes with full theme support — light, dark, and full black options available, color matching and custom color selection for the Quicktheme feature, improved Google Discover/Now and ActionDash integration, and more. This app requires Android 5.0 Lollipop or later.
https://www.notebookcheck.net/Action-Launcher-42-now-available-with-theme-enhancements-and-improved-integration.428364.0.html