function getRandomColor() {
                ranges = [
                    [100,250],
                    [100,170],
                    [200,250]
                ];
            var g = function() {
                //select random range and remove
                var range = ranges.splice(Math.floor(Math.random()*ranges.length), 1)[0];
                //pick a random number from within the range
                return Math.floor(Math.random() * (range[1] - range[0])) + range[0];
            }
            return \"rgb(\" + g() + \",\" + g() + \",\" + g() +\")\";
        };