We are prejudiced toward those who are different from us. Be it nationality, appearance, mannerism, sexual preference, or any thing about an individual that does not resemble the general public. We fear and judge what is different. So too does prejudice and discrimination exist in the New World. In the New World, each group believes they are superior than the group below them.
Alpha children wear grey.
They work much harder than we do, because they're so frightfully clever. I'm really awfully glad I'm a Beta, because I don't work so hard. And then we are much better than the Gammas and Deltas. Gamma are stupid. They all wear green, and Delta children wear khaki.