Adobe Kuler is an iPhone app that allows you to create a themed color palette based on photos taken with an iPhone camera or from imported photos from the web (the app provides you with a Google Images search option, which is convenient). As soon as you show the Kuler app an image, it starts capturing colors from the image and creates a customizable color theme. You can also create themes manually using the color wheel and standard color rules—analogous, monochromatic, triad, complementary). The themes are editable, and you can sync them with your Adobe account and the Creative Cloud and can be used for design purposes—it works especially well with Adobe Illustrator.
The image examples are left: my desk in the VRC and right: Sandy Skoglund’s Revenge of the Goldfish (1981).