Painting color over monochromatic sketch portrait step by step

Painting color on monochromatic sketch portrait step by step. Digital painting tutorial, I know a lot of artists start off monochrome or achromatic then go color and others start off with color. In this tutorial is just demonstrated one approach from many. So try out different ways will be good for you, and just go with what you feel comfortable most.Here is a quick post for those of you who