A tiny group of people can see ‘invisible’ colours that no-one else can perceive
> <i>Jordan’s “acid test” involved coloured discs showing different mixtures of pigment, such as a green made of yellow and blue. The mixtures were too subtle for most people to notice: almost all people would see the same shade of olive green, but each combination should give out a subtly different spectrum of light that would be perceptible to someone with a fourth cone.</i><p>From what I understand, a modern monitor is capable of displaying the entire range of colors perceptible to the human eye. Am I mistaken about that?<p>So would it not be possible to create a web-based version of these "coloured discs", and then we can test ourselves.