fourdjs/colours.js

import ColorScheme from 'color-scheme';
import Color from 'color';

export const get_colours = (basis) => {
	const basis_c = Color(basis);
	const hslb = basis_c.hsl();
	const hue = hslb['color'][0];
	const saturation = hslb['color'][1];
	const luminance = hslb['color'][2];
	const scheme = new ColorScheme;
	scheme.from_hue(hue).scheme("tetrade").distance(0.75);
	const colours = scheme.colors().slice(1, 9);
	colours.reverse();
	const hsl = colours.map((c) => Color("#" + c).hsl());
	const resaturated = hsl.map((hslc) => hslc.saturationl(saturation).rgbNumber()); 
	resaturated.unshift(basis);
	return resaturated;
}

// basic colours where 0 = blue
// 1 - dark blue
// 2 - white
// 3 - light cyan
// 4 - light orange
// 5 - dark orange

export const get_plain_colours = (basis) => {
	return [
		basis,
		0xffffff,
		0x00ff00,
		0xff0000,
		0x0000ff,
		0xff9900,
		0x000000,
		]
}