Function interpolator

Returns a function to interpolate between colours

import { Colour } from 'https://unpkg.com/ixfx/dist/visual.js'
const i = interpolator([`orange`, `yellow`, `red`]);

// Get a random colour on the above spectrum
i(Math.random());
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Results will vary depending on the colour space used, play with the options. When using a hue-based colour space, the hue option sets the logic for how hue values wrap.

interpolator([`orange`, `yellow`, `red`], { space: `hsl`, hue: `longer })
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