Free! TINEYE LABS MULTICOLR SEARCH ranks the aesthetic over application with a nifty way to search over 10 million Creative Commons Flickr images by up to 5 colors. Select a color or two...or five from the right-hand palette and the search engine will return images with those exact colors. Adding to the awesomeness is the ability to specify exactly what percentage of each color you'd like the image to incorporate. What's that you say? Show a collection of images composed of 15% lilac purple, 25% pale yellow, 30% golden yellow, 10% olive green, and 20% fuschia[-ish]? Done and done. Tip of the hat to Chad Sansing!