For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkandz/openSUSE_Tumbleweed/home:jkandz.repo
zypper refresh
zypper install tk-theme-sriv
For openSUSE Leap 15.1 PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkandz/openSUSE_Leap_15.1_PowerPC/home:jkandz.repo
zypper refresh
zypper install tk-theme-sriv
For openSUSE Leap 15.1 ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkandz/openSUSE_Leap_15.1_ARM/home:jkandz.repo
zypper refresh
zypper install tk-theme-sriv