For the upcoming game, Scott Washington's Relentless Dungeon.
I've been trying to keep the color palette for each monster visually different, so the zombie ended up being these pale maroon-like red colors.
I didn't want to draw too much clothing on the monsters because the monsters should be what is emphasized, not their equipment. In the case of the zombie I put his rotting stomach bits falling out and covering up his business.
To the right is the initial sketch for the zombie. I was thinking of having strips of clothing hanging off which then turned into strips of skin. That worked better to convey that the zombie is rotting. Which is what zombies do. And eat brains.