/// <summary>
/// Converts the RGB color format to CMYK
/// </summary>
/// <param name="c"></param>
/// <returns>Converted color</returns>
public static Cmyk RgbToCmyk(Color c)
{
var cmyk = new Cmyk();
double low = 1;
cmyk.C = Convert.ToDouble((255d - c.R) / 255d);
if (low > cmyk.C)
{
low = cmyk.C;
}
cmyk.M = Convert.ToDouble((255d - c.G) / 255d);
if (low > cmyk.M)
{
low = cmyk.M;
}
cmyk.Y = Convert.ToDouble((255d - c.B) / 255d);
if (low > cmyk.Y)
{
low = cmyk.Y;
}
if (low > 0)
{
cmyk.K = low;
}
return cmyk;
}
/// <summary>
/// Converts the CMYK color format to RGB
/// </summary>
/// <param name="cmyk"></param>
/// <returns>Converted color</returns>
public static Color CmykToRgb(Cmyk cmyk)
{
// To convert CMYK to RGB we first have to convert CMYK to CMY
var cyan = (cmyk.C * (1 - cmyk.K)) + cmyk.K;
var magenta = (cmyk.M * (1 - cmyk.K)) + cmyk.K;
var yellow = (cmyk.Y * (1 - cmyk.K)) + cmyk.K;
var red = Convert.ToInt32(Math.Round(cyan * 255d));
var green = Convert.ToInt32(Math.Round(magenta * 255d));
var blue = Convert.ToInt32(Math.Round(yellow * 255d));
return Color.FromArgb(red, green, blue);
}