using System;

using System.Drawing;

public class Program

{

    public class Position {

        public float X {get; set;}

        public float Z {get; set;}

        public Position(float x, float z){

            X = x;

            Z = z;

        }

    }

    public static void Main()

    {

        var pos = new Position(0,0);

        var h = (float)((pos.X + Math.Sin((pos.Z + pos.X) / 35) * 35) % 150) / 150;

        var color = HSBtoRGB(h, 0.6F, 1.0F);

        Console.WriteLine(string.Format("#{0:X2}{1:X2}{2:X2}",

                     color.R,

                     color.G,

                     color.B));

        Console.WriteLine(string.Format("hsb({0}, 60, 100)", h));

    }

    public static Color HSBtoRGB(float hue, float saturation, float brightness)

    {

        int r = 0, g = 0, b = 0;

        if (saturation == 0)

        {

            r = g = b = (int)(brightness * 255.0f + 0.5f);

        }

        else

        {

            float h = (hue - (float)Math.Floor(hue)) * 6.0f;

            float f = h - (float)Math.Floor(h);

            float p = brightness * (1.0f - saturation);

            float q = brightness * (1.0f - saturation * f);

            float t = brightness * (1.0f - (saturation * (1.0f - f)));

            switch ((int)h)

            {

                case 0:

                    r = (int)(brightness * 255.0f + 0.5f);

                    g = (int)(t * 255.0f + 0.5f);

                    b = (int)(p * 255.0f + 0.5f);

                    break;

                case 1:

                    r = (int)(q * 255.0f + 0.5f);

                    g = (int)(brightness * 255.0f + 0.5f);

                    b = (int)(p * 255.0f + 0.5f);

                    break;

                case 2:

                    r = (int)(p * 255.0f + 0.5f);

                    g = (int)(brightness * 255.0f + 0.5f);

                    b = (int)(t * 255.0f + 0.5f);

                    break;

                case 3:

                    r = (int)(p * 255.0f + 0.5f);

                    g = (int)(q * 255.0f + 0.5f);

                    b = (int)(brightness * 255.0f + 0.5f);

                    break;

                case 4:

                    r = (int)(t * 255.0f + 0.5f);

                    g = (int)(p * 255.0f + 0.5f);

                    b = (int)(brightness * 255.0f + 0.5f);

                    break;

                case 5:

                    r = (int)(brightness * 255.0f + 0.5f);

                    g = (int)(p * 255.0f + 0.5f);

                    b = (int)(q * 255.0f + 0.5f);

                    break;

            }

        }

        return Color.FromArgb(Convert.ToByte(255), Convert.ToByte(r), Convert.ToByte(g), Convert.ToByte(b));

    }

}

​