When making a titan skin, you need to put black sclera (eye whites) and then you can do any color iris, KingtheTitan has blue iris, meanwhile, Jade has purple iris.
Most titans have pale skin, but you don't have to do that if you don't want.
Titans typically have horns, but you don't have to put any. You can look at the horn design here.
Otherwise, do whatever you want! you can add wings, cute ears, or anything else you can think of!

I hope you enjoy making random titan skins,