Yesterday's rainbow. :-) Can you imagine a rainbow saying, Only primary colours allowed. Pink, get your fancy-pants outta here. We'll consider Magenta at the next meeting.
OR:
Red, tone it down. You're trying to get too much attention. Who do you think you are?
OR:
Where do you think YOU'RE going, Purple? We don't like your kind. You think you can just waltz in here expecting the same priviledges as Blue?
Sounds silly coming from a rainbow, doesn't it?