I don't know about sterotypes, but discrimination is genetic/evolutionary. Kids aren't blind, if there are some kids who clearly are a different color than them, they're going to notice and make something of it. Ignoring differences doesn't solve things; bringing them to light and, this is important, explaining why they don't matter is what stops discrimination.

This can't be said enough.
Seriously

Your second link didn't work for me, but yeah, "Colour Blindness" is basically "neutrality" which is to say, it is terrible.

From personal experience, and I had a couple stark changes during elementary school, I certainly learned racist behaviours, they weren't ingrained or anything.

Second link Fixed Asizien