colorjs.io/src/getColor.js

Let’s get serious about color

import ColorSpace from "./space.js";
import {isString} from "./util.js";
import parse from "./parse.js";

/**
 * Resolves a color reference (object or string) to a plain color object
 * @param {Color | {space, coords, alpha} | string} color
 * @returns {{space, coords, alpha}}
 */
export default function getColor (color) {
	if (!color) {
		throw new TypeError("Empty color reference");
	}

	if (isString(color)) {
		color = parse(color);
	}

	// Object fixup
	let space = color.space || color.spaceId;

	if (!(space instanceof ColorSpace)) {
		// Convert string id to color space object
		color.space = ColorSpace.get(space);
	}

	if (color.alpha === undefined) {
		color.alpha = 1;
	}

	return color;
}