rgb2hex, hex2rgb html color

rgbhex.js

function rgb2hex(rgb) 	//converte da array di valori 0-255 e stringa esadecimale
{
	function toHex(n) {
		n = parseInt(n,10);
		if (isNaN(n)) return "00";
		n = Math.max(0,Math.min(n,255));
		return "0123456789ABCDEF".charAt((n-n%16)/16)
		  + "0123456789ABCDEF".charAt(n%16);
	}
	return '#'+toHex(rgb[0])+toHex(rgb[1])+toHex(rgb[2]);
}

function hex2rgb(hex)
{		
  var c, o = [], k = 0, m = hex.match(/^#(([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})|([0-9a-f])([0-9a-f])([0-9a-f]))$/i);
      
  if (!m) return {r:0,g:0,b:0};
  for (var i = 2, s = m.length; i < s; i++) {
    if (undefined === m[i]) continue;
    c = parseInt(m[i], 16);
    o[k++] = c + (i > 4 ? c * 16 : 0);
  }
  return o;
}