No matter what user interface environment that you are using, Numix Theme is just a very simple linux theme, but pretty beautiful to experience…
$ sudo add-apt-repository ppa:numix/ppa -y
$ sudo apt-get update
$ sudo apt-get install numix-gtk-theme numix-icon-theme-circle -y
Make sure that you already have Unity Tweak Tools, then open Unity Tweak Tools and set theme & icon to Numix…
Hope you enjoy it…
Ps: Hereby some other option for your choice:
1) https://www.snwh.org/paper/download
2) https://github.com/horst3180/arc-theme
3) https://www.gnome-look.org/p/1171688/
4) https://snwh.org/moka/download
Currently, I am using default theme Radiance and icon Moka, I also adjust system’s font to Segeo UI Regular and DejaVu Sans Mono Book sizing 11
