My son had a light mongolian spot at the base of his spine, but it's gone now. I'm very Caucasian and hubby is Anglo Indian.

My step son had a very very dark mongolian spot that covered half his butt, lol. He is half Anglo Indian and half South American. He's 14 so I can't say I've ever seen his butt, hehe, but he accused us of making it up as a story, so I assume it's gone now