I’ve just come across an amazing website which has a colour- and shape-based search engine for photos. It’s called the Visual Search Lab, and is by Idee labs. If you’re at all interested in colours, go over and enjoy a photo safari! One tool uses flickr photos, so it might be a perfect way of finding a photo for that blogpost!
And when you’re done there, you might like to look at the Colour and Design Blog, where I heard about the visual search lab.
Then go and sit down quietly in a darkened room and dream of colours!