如何通过代码判断iPad是黑色还是白色？

function getIPadColor() {
  var userAgent = navigator.userAgent;
  var isBlack = userAgent.match(/iPad;.*CPU.*OS.*Mac OS X.*AppleWebKit.*Mobile.*Safari.*Mac.*Mac OS X.*Mac OS X.*Mac OS X/i);
  var isWhite = userAgent.match(/iPad;.*CPU.*OS.*Mac OS X.*AppleWebKit.*Mobile.*Safari.*Mac.*Mac OS X.*Mac OS X.*Mac OS X.*Mac OS X/i);

  if (isBlack) {
    return "黑色";
  } else if (isWhite) {
    return "白色";
  } else {
    return "未知颜色";
  }
}

console.log("iPad的颜色是：" + getIPadColor());