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.
Red, tone it down. You're trying to get too much attention. Who do you think you are?
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?