public void AverageTest()
{
var c1 = new HsvColor(10, 0.4, 0.6);
var c2 = new HsvColor(60, 0.2, 0.4);
var avg = HsvColor.Average(new[] { c1, c2 });
Assert.AreEqual(0.3, avg.Saturation, 0.0001);
Assert.AreEqual(0.5, avg.Brightness, 0.0001);
Assert.AreEqual(35, avg.Hue, 0.0001);
}