tetradic property
Returns a list of tetradic colors
Implementation
@override
List<PdfColorHsv> get tetradic => <PdfColorHsv>[
PdfColorHsv((hue + 120) % 360, saturation, value, alpha),
PdfColorHsv((hue - 150) % 360, saturation, value, alpha),
PdfColorHsv((hue + 60) % 360, saturation, value, alpha),
];