Aurora Next:
Aurora-Next theme isn't new but it's initial release was back in early 2015 and it looked great at that time and looks even more better, there are three variants in this suite and support almost every desktop such as Unity, Gnome Shell, Xfce, Cinnamon, Mate and so on but not compatible with KDE. You can choose from Blue, Green and Red variant from this suite as per your requirements. There are three Gnome Shell themes and Cinnamon theme with every variant, the supported versions of GTK are 3.20 and up. Numix-White icons used in the following screenshots. You can use Unity Tweak Tool, Gnome-tweak-tool to change icons.