Someone on Reddit posted about seeing a red orc. After about 5 mins I managed to reproduce it... It's actually really simple.
The way to do it is to simply modify the skin value of your player during the character creation screen. This isn't sanitised for some reason so you can just send it whatever. I've had undeads with invisible jaws and shit.
To get the pointer, open up cheat engine when you're in the character select screen. You're scanning for a value in the range 0-9, which is 4 bytes big and will be at value 6 if you select the darkest green orc skin. That should be easily enough info for you to quickly find it.
This points to the skin colour of the currently editing character. When you're in the character creation screen, set this value to 10 on an orc. You won't see anything change but when you create the character, your orc will be red.
This will inevitably get you banned because other people can see it and report you. Don't do it on your main account
Edit: still active, I haven't seen anybody else doing it yet