Viridis GTK - this theme is based on the ThinIce theme engine and was
designed using the various other ThinIce GTK themes available on
gtk.themes.org. This theme is licensed under the GPL.
I personally had to remove my ~/.gimp-1.1/gtkrc file in order for the
GIMP to work correctly with this theme - because the text boxes would
be white text on a white background when they should have been black on
white.
The theme itself was created around the Propaganda image
Metcalfe-Loves-Linux-4.JPG - as was the Viridis E theme and the Viridis
xmms, licq, and gkrellm skins.