Color blindness affects about 1 in 12 males. It can hinder education for youth, but there are things that can help.

Imagine seeing a color that no one who's walked the Earth has ever seen before. That's what US scientists say they've achieved in firing laser pulses into eyeballs, stimulating individual retina cells ...

"Olo" is said to be a saturated blue-green - but some say the existence of a new colour is "open to argument".