I created a nice desktop on one screen and wanted to copy the layout (wallpaper & plasmoids) to other screens / activities. Sadly I have not found a way to do this and feel like I have to copy it everywhere. There are a few posts regarding changing the background image with a rather complicated shell command. In my case I use a color instead of an image plus a few plasmoids.

Is there any way to create a default desktop design which is then copied to all desktops? Or something similar which would fit the description? Or alternatively at least a way to copy the background color to all screens? That would be of help as well