This program is intended for changing colors in SVG icon sets in relatively easy manner. The icon sets wont need any kind of preconditioning. The program searches through the files in the icon set for colors and presents them to the user for modifications. All colors can be changed to any of your liking. Effect of any modifications can easily be seen by applying the changes. Unwanted changes can easily be reverted. You can also save your modification configuration so you can do additional changes later. However note that this program can't change PNG or any other bitmap images.
This program gives you a bit more fine grained control over the colors in the icon set, but also requires bit more dedication. If you just want to quickly and easily to create some icon set with certain color scheme, one of these programs might suit you:
This page is just for advertisement. The real homepage for this program is http://code.google.com/p/ld-iconcolors/. The download link will also take you there. Be sure to read the instructions before using the program.