One day, in a South African school, the teacher came very upset into the classroom and started to shout: "I don't understand anything! What's all about this black and white thing? We must stop racism in any way!! What's this with blacks and whites!
I'm gonna make a rule in this classroom! From now on, we are no longer black or white! We are all blue! Ok? I'm glad you understand! All this racism must stop! Ok, I'm glad we had this conversation!
Now, if you will please take your seats! Yes, go on! No, no, not like that: it's dark blue on the left side and light blue on the right side! Is that clear??"