Board Thread:Questions and Answers/@comment-32491855-20170705230238/@comment-3053446-20170706043519

Most of them are done by Algrim Whitefang, he from the looks of it uses photomanipulation software such as GIMP 2.0 or Adobe Photoshop. Its relatively easy to manipulate a photo to a different color. I would recommend learning the software it is an incredibly valuable skill.