During the recent university Boat Race, my wife and I were discussing the colour of the Cambridge crew’s kit along the lines of: it’s not blue, it’s green; no it’s not green, it’s blue. It turns out we were both wrong. It’s olo (Hue new? Scientists claim to have found colour no one has seen before, 18 April). There’s nothing new under the sun.

John Cater

Wimbledon, London

US scientists: “We’ve found an unprecedented colour signal.” Me: “Oh, that’s the colour of a waterproof jacket I’ve just ordered.”

Anne Cowper

Bishopston, Swansea

The scientists who found a new colour missed a trick in not naming it octarine. Its description in Terry Pratchett’s Discworld novels as “a greenish-yellow purple colour visible only to wizards and cats” seems to fit their discovery pretty well.

Ian Simmons

Westcliff-on-Sea, Essex

Scientists believe they have found a new colour no one has seen before. Are you sure this isn’t just a pigment of their imagination?

Martin S Taylor

Byfleet, Surrey

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