Hehe;3 Night elves do come in purple, but they also come in blue and white. As for their ears, they are longer, and are shaped outward. Blood elves ears are upright and shorter, thus easily to distinct the two races. And most night elves have fangs too at their teeth ;3 And well, blonde is not a hair color night elves use either, blue, white, purple, etc, all unnatural colors, which are just the colors blood elves use, all, usually natural. And demon hunter skin can change color and texture, due to the demon essence they absorb, it can turn dark purple and even looking like it has a tree ''bark'' texture, it's hardened to blows and etc. :3