public void GetBrightnessTest()
{
ExtendedColors ec = ExtendedColors.FromKnownColor(KnownExtendedColors.MareaBaja);
Color c = Color.FromArgb(unchecked ((int)0xFF2E5464));
Assert.AreEqual(Math.Round(c.GetBrightness(), MidpointRounding.AwayFromZero), Math.Round(ec.GetBrightness(), MidpointRounding.AwayFromZero));
}