colorjs.io/src/spaces/rec2020-linear.js

Let’s get serious about color

import RGBColorSpace from "../RGBColorSpace.js";

/** @import { Matrix3x3 } from "../types.js" */

/**
 * Matrices used by this color space, also available as `REC_2020_Linear.M`.
 * Uses D65 (no chromatic adaptation).
 * http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
 * @type {Record<string, Matrix3x3>}
 */
// prettier-ignore
export const M = {
	// 0 is actually calculated as 4.994106574466076e-17
	toXYZ: [
		[ 0.6369580483012914, 0.14461690358620832,  0.1688809751641721  ],
		[ 0.2627002120112671, 0.6779980715188708,   0.05930171646986196 ],
		[ 0.000000000000000,  0.028072693049087428, 1.060985057710791   ],
	],
	// from ITU-R BT.2124-0 Annex 2 p.3
	fromXYZ: [
		[  1.716651187971268,  -0.355670783776392, -0.253366281373660  ],
		[ -0.666684351832489,   1.616481236634939,  0.0157685458139111 ],
		[  0.017639857445311,  -0.042770613257809,  0.942103121235474  ],
	],
};

export default new RGBColorSpace({
	id: "rec2020-linear",
	cssId: "--rec2020-linear",
	name: "Linear REC.2020",
	white: "D65",
	M,
});