Many people are surprised to find internet screenshots that can be a new desktop theme for future versions of Ubuntu.
This theme has a name, New Harmon theme, and it breaks with the esthetic of the previous theme. Now, the theme is darker than the original theme, the human.
Black and brown colors represent, though the theme still includes orange touches that always mark the Canonical's GNU / Linux distribution.
If you want to experience one of the most recommended ground-breaking themes of Ubuntu's replacement of the human theme, do not worry twice about downloading a new theme.