public int CompareTo(Color other)
{
int comparison;
var thisCategory = GetColorCategory();
comparison = ((int)thisCategory).CompareTo((int)other.GetColorCategory());
if (comparison != 0)
{
return(comparison);
}
comparison = ColorConversion.RgbToLum(ColorConversion.ColorToRgb(this))
.CompareTo(ColorConversion.RgbToLum(ColorConversion.ColorToRgb(other)));
if ((int)thisCategory % 2 == 0)
{
comparison = -comparison;
}
if (comparison != 0)
{
return(comparison);
}
return(comparison);
}
private ColorCategory GetColorCategory()
{
var rgb = ColorConversion.ColorToRgb(this);
var hsv = ColorConversion.RgbToHsv(rgb);
if (hsv[1] < 0.12f)
{
return(ColorCategory.Grays);
}
float lumCutoff;
if (hsv[1] > 0.9)
{
lumCutoff = 0.1f;
}
else if (hsv[1] > 0.8)
{
lumCutoff = 0.13f;
}
else if (hsv[1] > 0.6)
{
lumCutoff = 0.19f;
}
else if (hsv[1] > 0.4)
{
lumCutoff = 0.22f;
}
else
{
lumCutoff = 0.28f;
}
var lum = Math.Sqrt(ColorConversion.RgbToLum(rgb));
if (lum < lumCutoff)
{
return(ColorCategory.Grays);
}
if (hsv[0] <= 26)
{
return(ColorCategory.Red);
}
if (hsv[0] <= 44)
{
return(ColorCategory.Orange);
}
if (hsv[0] <= 69)
{
return(ColorCategory.Yellow);
}
if (hsv[0] <= 152)
{
return(ColorCategory.Green);
}
if (hsv[0] <= 184)
{
return(ColorCategory.Cyan);
}
if (hsv[0] <= 257)
{
return(ColorCategory.Blue);
}
if (hsv[0] <= 296)
{
return(ColorCategory.Purple);
}
if (hsv[0] <= 330)
{
return(ColorCategory.Pink);
}
return(ColorCategory.Red);
}
