If you like classic things, but you’re a bit tired of the graphics of the Ubuntu desktop default theme, then maybe it’s time to take a look at AmbianceDF.
Same classic Ambiance theme, but different
The Ubuntu colors palette has been created to reflect the spirit of the community and the brand. Orange for a community feel. White for a clean, fresh and light mood.
So, a small refresh of the classic Ambiance theme following the directives of the Ubuntu design team. Take a look at the brand color palette.
Latest release of AmbianceDF is updated for Ubuntu 17.10 and GNOME 3.22, but you can also find old release that perfectly fits the Unity interface.
You can grab the theme from my GitHub: