Need a killer color theme for your web site, art project, or magazine pages? Head to Adobe Kuler, an interactive web-based app that whips up snazzy themes in a matter of seconds. Kuler (not sure if it rhymes with "color" or "cooler") lets you browse other users' themes or create your own using a drag-and-drop color wheel and/or numerical settings (RGB, CMYK, etc.). You can title, tag, save and pub