Flat Remix icons and Gnome shell theme are not new, both were initially released back in the 2015 and are still in active development. The icon set fits perfect on all kind of dark and light themes, it is release under GPL V3 license. Flat remix icons is a pretty simple icon theme inspired on material design. It is mostly flat with some shadows, highlights and gradients for some depth and uses a colorful palette with nice contrasts, and it is compatible with almost every desktop environments such as Gnome, Unity, KDE, Xfce, Cinnamon, Mate and so on. You can report bugs or suggest new icons to include in this icon set via this link. Flat Remix theme is pretty simple and elegant, it is a material design theme for Gnome Shell. If you find any bugs then report here. You can use Unity Tweak Tool, Gnome-tweak-tool to change themes/icons.
Available for Ubuntu 17.04 Zesty/16.10 Yakkety/16.04 Xenial/Linux Mint 18/other Ubuntu derivatives
To install Flat Remix Theme (Gnome Shell) in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:
Available for Ubuntu 17.04 Zesty/16.10 Yakkety/16.04 Xenial/14.04 Trusty/Linux Mint 18/17/other Ubuntu derivatives
To install Flat Remix Icons in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:
That's it
Available for Ubuntu 17.04 Zesty/16.10 Yakkety/16.04 Xenial/Linux Mint 18/other Ubuntu derivatives
To install Flat Remix Theme (Gnome Shell) in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:
Available for Ubuntu 17.04 Zesty/16.10 Yakkety/16.04 Xenial/14.04 Trusty/Linux Mint 18/17/other Ubuntu derivatives
To install Flat Remix Icons in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:
That's it