arc-theme
Arc is a theme for GTK 3, GTK 2 and Gnome-Shell.
Arc is a flat theme with transparent elements for GTK 3, GTK 2 and Gnome-Shell. It supports GTK 3 and GTK 2 based desktop environments like Gnome, Unity, Budgie, Pantheon, etc.
There is no official package available for openSUSE Leap 15.5Distributions
openSUSE Tumbleweed
openSUSE Backports for SLE 12 SP5
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.