react-photo-layout-editor/src/PhotoLayoutEditor/lib/color.js

Photo layout editor for react

/**
 * rgba to hex
 *
 * @param {String} color
 * @return {String}
 */
export function rgbToHex(color)
{
	color = color.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i);
	return (color && color.length === 4) ? "#" +
		("0" + parseInt(color[1],10).toString(16)).slice(-2) +
		("0" + parseInt(color[2],10).toString(16)).slice(-2) +
		("0" + parseInt(color[3],10).toString(16)).slice(-2) : '';
}