Tutorial: Adding Color With Gradient Maps

Description

My progress image for the Yoi painting seems to have been well received, and I've gotten questions in the past about how I add color to my monochrome images. I tried to find some good Gradient Map tutorials to show other deviants, but I had no luck. So I made one myself.

I'm not that great at making tutorials, so I hope it isn't confusing. It's probably not the best for beginners at Photoshop. I hope you enjoy, regardless.