题解 | #颜色字符串转换#

function rgb2hex(sRGB) {
   let colorNums = sRGB.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
   let [str, red, green, blue] = colorNums;
   return "#" + [red, green, blue].map(item => ((Number(item).toString(16))).padStart(2, '0')).join("");
}