Let's say I have a nice blue elf hat..
But, my favorite color is orange. With GIMP you can turn that hat into this..
Or maybe these...
Once you learn this simple technique, you can change the color of it all!
1: Take your base image..
Quite simple!
2: Choose the paintbrush tool..
After you choose that under mode go to "color".
3: Paint..
Choose a color (I am using red) and paint over the area you want to change color, and only that area!
There you go, if you just want to try out, feel free to use the blue elf hat! (if you save it to your own computer, you will be able to open it in GIMP and have the transparency!) I would love to see what you come up with.
Dude