Get hsl color with javascript

问题:

If I have this:

.box{
  color: #FF3010;
  background: hsl(0,90%,40%);
}

and then this:

var box = document.querySelector(".box");
var result = document.querySelector(".result");
result.innerHTML = "BG color: "+window.getComputedStyle(box).backgroundColor;
result.innerHTML += "<br>";
result.innerHTML += "color:"+window.getComputedStyle(box).color;

The problem is that it always prints the values in rgb. So, I have 2 questions:

1. Is it posible to get the value as written in the css?
2. Is it posible to force the color to be hsl instead of rgb?