$ sudo apt-get update
$ sudo apt-get install plasma-desktopthemes-artwork 

plasma-desktopthemes-artwork is installed in your system.

Make ensure the plasma-desktopthemes-artwork package were installed using the commands given below,

$ sudo dpkg-query -l | grep plasma-desktopthemes-artwork *

You will get with plasma-desktopthemes-artwork package name, version, architecture and description in a table

plasma-desktopthemes-artwork package basic information: