public static double Distance(Bgr color1, Bgr color2)
{
double r1 = color1.Red;
double r2 = color2.Red;
double g1 = color1.Green;
double g2 = color2.Green;
double b1 = color1.Blue;
double b2 = color2.Blue;
return Math.Sqrt((r1 - r2) * (r1 - r2) + (g1 - g2) * (g1 - g2) + (b1 - b2) * (b1 - b2));
}