Inspired by the color scheme provided at http://flatuicolors.com. This theme is for GNU Emacs version 24+, in which theming is officially supported.
Both light and dark style are included.
Note: Nyan cat not included :-p
Copy the el files to somewhere in your Emacs load-path. Then either
M-x load-theme<RET>FlatUI or (load-theme 'FlatUI t). Use
FlatUI-Dark for the dark style.