Help, please?

Okay, I feel like an absolute idiot asking this...but...does anyone think they could help me remember how I made (the coloring) these?:

&nsbp;

And here's the origial pictures if that helps even the slightest bit:
This picture was used for the first icon, and this one for the second.

Also, I believe for the first icon, I used a tutorial for the coloring, but I've searched high and low for the tutorial and still cannot find it. So, thank you to anyone that helps out.