Generate random pretty and distinctive color

    public static class ColorHelper
    {
        public static IEnumerable<Color> GetRandomColors(int amount)
        {
            var results = new List<Color>();

            var random = new Random();

            var threshold = amount / 2d;

            var maxAmount = Math.Min(amount, threshold);
            var div = amount - maxAmount;
            var difference = 360d / maxAmount;

            //ændr denne variabel til 1.0 for at få pænere (skarpere farver).
            double prettiness = 0.25;

            for (double i = 0.0, o = 0.0; i < amount || o < 1; i++, o+= (1.0 - prettiness) / div)
            {
                results.Add(HsvToRgb(i * difference, 1.0, prettiness + o));
            }

            return results;
        }

        public static Color GetRgb(double r, double g, double b)
        {
            return Color.FromArgb(255, (byte)(r * 255.0), (byte)(g * 255.0), (byte)(b * 255.0));
        }

        public static Color HsvToRgb(double h, double s, double v)
        {
            int hi = (int)Math.Floor(h / 60.0) % 6;
            double f = (h / 60.0) - Math.Floor(h / 60.0);

            double p = v * (1.0 - s);
            double q = v * (1.0 - (f * s));
            double t = v * (1.0 - ((1.0 - f) * s));

            Color ret;

            switch (hi)
            {
                case 0:
                    ret = GetRgb(v, t, p);
                    break;
                case 1:
                    ret = GetRgb(q, v, p);
                    break;
                case 2:
                    ret = GetRgb(p, v, t);
                    break;
                case 3:
                    ret = GetRgb(p, q, v);
                    break;
                case 4:
                    ret = GetRgb(t, p, v);
                    break;
                case 5:
                    ret = GetRgb(v, p, q);
                    break;
                default:
                    ret = Color.FromArgb(0xFF, 0x00, 0x00, 0x00);
                    break;
            }
            return ret;
        }
    }