Water portrait by Bill Viola. Stills from a moving image which shows the movement of the water. Three prominent colours (blue, skin-colour and brown) which creates a simplistic effect, focusing on the movement of the water and facial expressions.
This technique is called "zoom burst" where you take a long exposure and zoom in or out while the shutter is still open. With just a little practice and experimentation, it's a really easy effect to achieve. Greg Foster Photography on Flickr www.photoideashop.com