Install new KDE desktop theme

Just extract the package to ~/.kde/share/apps/desktoptheme/


Download Caledonia theme.


tar -xvvf ~/Downloads/Caledonia.tar.gz -C .kde/share/apps/desktoptheme/

Now, visit the Desktop theme menu to set this as default.

Login screen theme:

Apparently there is no interface to change these, for regular users. However, the location is:



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