Have you ever thought about a program where you would simply click on any colors and then photos in the selected coloring would be displayed in a noticeably larger range compared to Google or Yahoo? If so, we have good news for you - the program already exists, it works, and it has more than 10 million images extracted from Flickr. By simply refining the visual query (the Piximilar system selects images similar to a specified image object), it achieves quite effective results with a collection of up to 10 colors. More here.