Hue

But astronomers have recently stumbled upon one that glows a greenish colour, and they think that colour depends on the combination of the helium that forms the atmosphere of a white dwarf and whatever other elements it has come into contact with.

The green star appears to have interacted with sodium, lithium and calcium to give it its ghoulish hue.

Hue, H-U-E, is a fancy word for colour.

So how far away from us is this green star? It's about 65 light years.

That's 65 times the distance that a beam of light can travel across the universe in a year.

Question number one.

Starting with H, what is the fancy three-letter word for colour that I mentioned in the story about the green star? MUSIC Yes, that's right.

The word is Q-H-U-E.

Every pair of coded categories should differ on at least two perceptual dimensions.

Hue plus lightness, or hue plus pattern.

So a color vision deficient user always has a non-hue cue to fall back on.

Give me the gold standard.