**edit: woops I forgot to paste in a step! ;w; ---> [link]
I apologize in advance since I’m not really good at explaining things, and although I like to draw in 5 million different styles, this is how I generally color?
(This is more for people who are familiar with art programs and their functions like Lock Transparency and Brush Settings.)
This can all be done in Photoshop, though using SAI will be easier.
Finished PDF file: [link]
Semi-finished SAI file (before Photoshop effects): [link]