Simplex themes is available in these colors blue, green, grey-scale orange, red, and turquoise. Also this themes is available for Cinnamon, Gnome Shell, GTK 3/2, OpenBox, xfwm4.
1st: Simplex theme for Chrome/Chromium (Click Here)
2nd: zonColor wallpapers used in screenshots, Also checkout Black Wallpapers
3rd: Awoken-icons used in screenshots, Also checkout icons collection
4th: You can use Gnome-tweak-tool or Ubuntu-Tweak to change icons and themes.
To install simplex theme in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal: