First Commit

node_modules/culori/src/yiq/convertRgbToYiq.js

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+const convertRgbToYiq = ({ r, g, b, alpha }) => {
+	const res = {
+		mode: 'yiq',
+		y: 0.29889531 * r + 0.58662247 * g + 0.11448223 * b,
+		i: 0.59597799 * r - 0.2741761 * g - 0.32180189 * b,
+		q: 0.21147017 * r - 0.52261711 * g + 0.31114694 * b
+	};
+	if (alpha !== undefined) res.alpha = alpha;
+	return res;
+};
+
+export default convertRgbToYiq;

node_modules/culori/src/yiq/convertYiqToRgb.js

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+const convertYiqToRgb = ({ y, i, q, alpha }) => {
+	const res = {
+		mode: 'rgb',
+		r: y + 0.95608445 * i + 0.6208885 * q,
+		g: y - 0.27137664 * i - 0.6486059 * q,
+		b: y - 1.10561724 * i + 1.70250126 * q
+	};
+	if (alpha !== undefined) res.alpha = alpha;
+	return res;
+};
+
+export default convertYiqToRgb;

node_modules/culori/src/yiq/definition.js

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+import convertRgbToYiq from './convertRgbToYiq.js';
+import convertYiqToRgb from './convertYiqToRgb.js';
+import { interpolatorLinear } from '../interpolate/linear.js';
+import { fixupAlpha } from '../fixup/alpha.js';
+
+/*
+	YIQ Color Space
+
+	References
+	----------
+
+	Wikipedia:
+		https://en.wikipedia.org/wiki/YIQ
+
+	"Measuring perceived color difference using YIQ NTSC
+	transmission color space in mobile applications"
+		
+		by Yuriy Kotsarenko, Fernando Ramos in:
+		Programación Matemática y Software (2010) 
+
+	Available at:
+		
+		http://www.progmat.uaem.mx:8080/artVol2Num2/Articulo3Vol2Num2.pdf
+ */
+
+const definition = {
+	mode: 'yiq',
+
+	toMode: {
+		rgb: convertYiqToRgb
+	},
+
+	fromMode: {
+		rgb: convertRgbToYiq
+	},
+
+	channels: ['y', 'i', 'q', 'alpha'],
+
+	parse: ['--yiq'],
+	serialize: '--yiq',
+
+	ranges: {
+		i: [-0.595, 0.595],
+		q: [-0.522, 0.522]
+	},
+
+	interpolate: {
+		y: interpolatorLinear,
+		i: interpolatorLinear,
+		q: interpolatorLinear,
+		alpha: { use: interpolatorLinear, fixup: fixupAlpha }
+	}
+};
+
+export default definition;