There is no best way.

There are many good ways. Each is appropriate for different situations. The ones that I know a bit about are wavelet-based, so I'd probably do something based on that if I had to hand-roll something. (I'd look for pre-built solutions first though.)

In reply to Re: the difference between two colors, and how to describe a color by tilly
in thread the difference between two colors, and how to describe a color by pg

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