Elegance Colors is a highly customizable chameleon theme for Gnome Shell. It can change colors according to the current GTK theme, current wallpaper (uses imagemagick to get color) or use a user defined color
Currently Elegance Colors supports Gnome Shell 3.6 to 3.12
Installation: http://satya164.deviantart.com/art/Gnome-Shell-Elegance-Colors-305966388