Install kdepim-themeeditors by entering the following commands in the terminal:
sudo apt update sudo apt install kdepim-themeeditors
Description:
Theme Editors for KDE PIM applications
KDE PIM Theme Editors allow you to create and edit various KDE themes for KDE PIM software such as KMail and KAddressBook.
Homepage: http://pim.kde.org/
Version: 4:17.12.3-0ubuntu1
Section: universe/kde