I mean a built in ability using a color pallet, hue, or something to change the color. It’s been done in other editors with more simple graphics. I believe RPG Maker has this ability for example (for simplistic 2d art).
If all you want is a hue, take the texture, change the hue in a graphics editor and use the new texture… Don’t think that really works for most textures though as they contain a variety of colors and ‘parts’, so its not like you change e.g a zombie from brown to red and the pants or whatever stay the same color…
You also need to add a new zombie dbr and make sure it spawns, so the texture / hue is the least of your problems really (once you know how to convert a texture back to an image file you can edit)