code: function(color, diff) {
  		if (!(diff instanceof Array)) { diff = ROT.RNG.getNormal(0, diff); }
  		var result = color.slice();
  		for (var i=0;i<3;i++) {
  			result[i] += (diff instanceof Array ? Math.round(ROT.RNG.getNormal(0, diff[i])) : diff);
  		}
  		return result;
  	}
docs: Create a new random color based on this one
  @param {number[]} color
  @param {number[]} diff Set of standard deviations
  @returns {number[]}