Duck Hunt Remake sprites (And other general sprites)

[Koh]

Examining it over again, though, I can tell you initially had an outline, and then colored over it. What's your protocol or algorithm to determine where to put color on the outline? At first I thought it'd just be in the direction of the light source, but that doesn't seem to ring true when I look at his ears (which don't seem pointy enough upon second review), sword and shoes.