Matching Pairs IDIOMS. COLORSOnline version IDIOMS. COLORS by María Marteles 1 Gray area 2 Take the red eye 3 Caught red-handed 4 To be a black sheep 5 To tell a white lie 6 Out of the blue 7 To have a green thumb 8 Green with envy 9 To be tickled pink 10 Once in a blue moon randomly, without warning, surprisingly to catch someone in the act of doing something to be the outcast, odd one out, unlike the others to be extremely pleased a small lie that is told to be polite or avoid hurting someone’s feelings to be skilled at gardening something that is unclear, undefined to be very jealous, envious a late night flight that arrives early in the morning very rarely