Dark GTK-3 Theme
Modified Original Breeze GTK-2/3 Theme, adapted for Plasma Theme Breeze-Blue-Dark , which you can download: Here
The theme was tested on KDE Plasma 5.17, for GTK applications in Plasma.
Link to Wallpaper Breeze Blue Dark Plasma Theme Wallpaper : Here
Link to Wallpaper KDE Plasma Scenery 174 4K Remastered : Here
Author Wallpapers: Charlie-Henson