Arc GTK Theme is a flat desktop theme written with GTK+ GUI toolkit, designed specifically for use with any Linux desktop environment that’s also written in GTK+, such as GNOME, Budgie, Xfce, LXDE, and others. The theme offers three different styles, Arc, Arc-dark, and Arc-darker, as well as transparent elements. David Mohammed from the Ubuntu Budgie Remix project, an unofficial Ubuntu flavor built around the Budgie desktop environment from the Solus Project, was the one to upload the Arc GTK Theme to the universal software repositories of the upcoming Ubuntu 16.10 (Yakkety Yak) operating system last month.