In Star Trek, what colour is Mr Spock's blood?
Purple | Blue | Red | Green
What colour is the blood of cockroaches?
What colour was the owl and the pussycat's boat?
Banana yellow | Carrot orange | Pea green | Apple red
Is colour blindness more common in men or women?
Men | Women
What colour berets do the United Nations peacekeeping forces wear?
What colour does litmus paper turn in the presence of acid?
Red | Blue | Green
What colour are copper sulphate crystals?
Blue | Red | Yellow | White
What colour is pistachio ice-cream?
In the game of snooker, which colour ball is worth four points?
