Since it was in demand, I'm posting this.
And yes, it's in graphics since it has to do with graphics...
We're going to go from something like
I know the positions aren't exactly the same but you guys probably know what I mean.
Step 1: Open a 100 x 100 base. [Don't have to, but if your making a signature use it on every picture layer.]
Step 2: Get a image to use.
Step Three: Go to the Channel Mixer and make sure the numbers match!
And you'll have something like this.
After your done the coloring, feel free to add some text or other things.
Other results with this tutorial.