Improve colour naming

[adrinux]

Colour names are currently static and assigned crudely on the basis ranges of degrees around the circle of hue. For certain input colours this leads to some output colours being misnamed vs their perceived colour. For instance yellow may look lime green, red may look pink.

Whilst this has no affect on end user perception it will cause some cognitive dissonance for someone coding CSS using the colours.

It's not clear how to fix this at present but it would be nice.

[adrinux]

There has been much work on colour naming and both freely available datasets plus web based APIs are available to name colours.

Resources:

• Color-Names on github (only 30089 colours
• The Color API home page
• Color API docs
• Color Names API (over 3 million named colours
• Color Names API data download

Would probably be better to use downloaded data rather than depend on a network connection?
Would only need to name the main colours - call to the public API and fall back on our current naming scheme if network not available.