Bummer, I've been watching this game for over a year now hoping by now this would be a mostly complete game . I'll just keep an eye on this one since MBM is such a master piece.
I didn't quite understand how and what to do, I need to create a file.cs and write one of the codes in it and name the file according to the game files like Man, Player and Goblin? Or did I get something wrong?
Well after going back and forth seeing how it worked back in 4.0.4 and 5.0.1 I managed to get different color offspring working; it was a matter of avoiding the defaulting colors to "#FFFFFF" that was implemented in this new patch.
For Women, Sisters, Oni and Shortstacks you do have to have in mind they do have some "set.spine" variables to be added into the .cs file you create, otherwise the offsprings will be bald or colorless.
Goblin code provided below should work the same if you change values to Orc, but you do have to tweak it a little bit for female variants.
I also noticed the "Man" files for the enemy soldiers have "#RANDOM" for their color, but doing so for the monsters causes the game to crash, for some reason. Also, Shortstacks and Oni produce default color offspring no matter what code script you pull if they are crossed with the Player.