Clean flat Grey with flat colors all around that make for a very clean looking desktop.
There is Plasma themes and Gtk themes to match and even Konsole colors
There is three color schemes ranging from light grey to a dark grey.
I love the flat color schemes because if you haven't figured out I spend too much time on my PC and this helps with eye strain a lot.
I hope you like them.
Icons in the screenshots are the Newaita icons and they are a perfect match. You can find them here:
The color scheme in the screenshots is the Simply Grey Dark color scheme