Search Flickr by Color
I came across this cool tool from Idée on Circulation this morning. It allows you to search Flickr Creative Commons liscensed photos (or photos from Alamy) by clicking on the color or colors you want the photos to have. You then click on the thumbnail to get the photo and the liscense information.
The only down side is the collage doesn’t list the url of the photos it generates so you can’t really use it as a whole and follow the attribution part of CC.