So, concerning the tutorial I just posted, a couple notes 

1) everything I do I do very quickly - I don’t spend a lot of time on these drawings, because a) I’m ADD as hell and while I can spend a lot of time on something, I generally do these sketches to warm up b) I get anxious and I’m afraid I’m gonna mess it up c) I find it soothing to work quickly, because if I DO mess it up, at least it wasn’t a huge waste time time (?) (art psychology, folks)

Thus, you get a lot of mistakes that I see but I leave them - I think those mistakes sort of add to my “style”? 

2) Everything I do I do for the sake of the narrative, when it comes to coloring. I’m no wizard at rendering - everything I’m adding highlights to, I simply want you to pay attention to - 

the brightest ambient light from the tent I’ve shown hitting their faces in very specific if not realistic points, because it a) better shows their expression b) reinforces the distance between their facial features, making them more recognizable and c) brings your eye to the main point of the narrative, in this case, the fact that these ancient exhausted murder-knights can still relax into something more human, when allowed. 

And when it comes to coloring or contrasts, everything I chose is to better explain the figures to the viewer - 

Here, Isabeau has the darkest tunic, the same tone as the men’s hair, creating a triangle framing her face, as she’s the focus of their body language. It shows the viewer she’s pinned tightly between them, as their shirts are lighter. The different flowery fabric and texture of her neck wear acts like a focus up to her face, also reinforcing the femininity of her shape. 

I use brushes to define different textures quickly - fabrics, skin and light I all use very specific brushes for, over and over in each of these I do.