ColorHelper.Net/ColorConverter.cs at master · forReason/ColorHelper.Net · GitHub

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using System;
using System.Drawing;

namespace ColorHelper
{
    /// <summary>
    /// the colorconverter class can be used to convert different library, color spaces or denotations
    /// </summary>
    public static class ColorConverter
    {
        public static System.Drawing.Color ConvertColor(System.Windows.Media.Color mediaColor)
        {
            return System.Drawing.Color.FromArgb(mediaColor.A, mediaColor.R, mediaColor.G, mediaColor.B);
        }
        public static System.Windows.Media.Color ConvertColor(System.Drawing.Color drawingColor)
        {
            return System.Windows.Media.Color.FromArgb(drawingColor.A, drawingColor.R, drawingColor.G, drawingColor.B);
        }
        public static System.Windows.Media.Color FromHex(string color)
        {
            return (System.Windows.Media.Color)System.Windows.Media.ColorConverter.ConvertFromString(color);
        }
        public static void ColorToHSV(Color color, out double hue, out double saturation, out double value)
        {
            int max = Math.Max(color.R, Math.Max(color.G, color.B));
            int min = Math.Min(color.R, Math.Min(color.G, color.B));

            hue = color.GetHue();
            saturation = (max == 0) ? 0 : 1d - (1d * min / max);
            value = max / 255d;
        }

        public static Color ColorFromHSV(double hue, double saturation, double brightnessValue)
        {
            int hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6;
            double f = hue / 60 - Math.Floor(hue / 60);

            brightnessValue = brightnessValue * 255;
            int v = Convert.ToInt32(brightnessValue);
            int p = Convert.ToInt32(brightnessValue * (1 - saturation));
            int q = Convert.ToInt32(brightnessValue * (1 - f * saturation));
            int t = Convert.ToInt32(brightnessValue * (1 - (1 - f) * saturation));

            if (hi == 0)
                return Color.FromArgb(255, v, t, p);
            else if (hi == 1)
                return Color.FromArgb(255, q, v, p);
            else if (hi == 2)
                return Color.FromArgb(255, p, v, t);
            else if (hi == 3)
                return Color.FromArgb(255, p, q, v);
            else if (hi == 4)
                return Color.FromArgb(255, t, p, v);
            else
                return Color.FromArgb(255, v, p, q);
        }

    }
}