This might be interesting tip for all designers and all creative people. I just came to see this tool (Multicolr) which can help us to search flickr photos using color. This tool is a search by color tool for flickr. People behind multicolr is Tineye who are also behind reverse image search engine where in we can upload to TinEye and we can find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions etc.
How to use Multicolr ?
You can click on the palette shown at the top right. On clicking the color multicolr search engine looks for images matching the criteria. You can also select multiple color so that result will contain that particular color combo. The combination color can be deleted by clicking on the thrash icon shown with the color.
To recapitulate, this tool will be useful for all plebeians who are interested in art.