c# - Converting Hex Color Code to Color Name (string)

I want to convert a hex color code to the suitable string color name... with the following code I was able to get the hex code of the "most used" color in a photo:

class ColorMath
{
    public static string getDominantColor(Bitmap bmp)
    {
        //Used for tally

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

        int total = 0;

        for (int x = 0; x < bmp.Width; x++)
        {
            for (int y = 0; y < bmp.Height; y++)
            {

                Color clr = bmp.GetPixel(x, y);

                r += clr.R;
                g += clr.G;
                b += clr.B;

                total++;
            }
        }


        //Calculate average
        r /= total;
        g /= total;
        b /= total;

        Color myColor = Color.FromArgb(r, g, b);
        string hex = myColor.R.ToString("X2") + myColor.G.ToString("X2") + myColor.B.ToString("X2");

        return hex;
    }

}

So I want for a hex code like: #3A322B to appear something like "dark brown"