elementary-theme from X11:Pantheon project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Pantheon/openSUSE_Tumbleweed/X11:Pantheon.repo zypper refresh zypper install elementary-theme
For openSUSE Leap 15.2 Ports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Pantheon/openSUSE_Leap_15.2_Ports/X11:Pantheon.repo zypper refresh zypper install elementary-theme