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