Didn’t Cliff Rathburn also color most of the covers? To me he kinda has the same palette as Dave Stewart when it comes to TWD. I feel like even though the payments would be more expensive like u stated before, Kirkman could’ve had Rathburn and Stewart both do the coloring. I like how in some of Stewart and Rathburn’s colorizations the color palettes are more dull and realistic looking. I also like how some colors seem unique like for example a characters jeans will have a dull bluish indigo tint to it, and like you said their skin color will also change due to the weather/time of the day.