use this custom psd. coloring file to make
Icon Coloring PSD #1 by soy
examples made using this psd
number of layers : 7
Download Link for the PSD file *what is a psd file ?
PSD files are generally a layered file that is proprietary to Adobe Photoshop. Basically you download the psd that ive created and follow the instructions listed about the base and you should be able to have a ready to use coloring solution.
*after downloading the PSD
instructions : crop your image and have it as the base layer and duplicate it and set it screen while adjusting the opacity, also you can play around with the selective coloring in this psd for to liking.