It reminds me the abstract colors that we could get with early versions of Blender (around 2.32) when we stopped the render before it was completed.
On the image below, you can see on the left the finished render, and on the right side, an image colorized with an uncomplete render :

French Blender user - CPU : intel Quad QX9650 at 3GHz - 8GB of RAM - Windows 7 Pro 64 bits. Display GPU : GeForce GTX 480 (2 Samsung 2443BW-1920x1600 monitors). External GPUs : two EVGA GTX 580 3GB in a Cubix GPU-Xpander Pro 2. NVidia Driver : 368.22.