Color Blender
Unless you are some kind of color-blending genius, this tool will save you hours of tweaking, giving your Web graphics work a visual appeal that might otherwise be missing. All you do is enter two colors, specify how many midtones you need, and let the app spit out the results. Eric Meyers released this JavaScript color blender under a Creative Commons license, making it okay to download the app and use it on your own system.