clayNightOperatorHue function
Night operators: kelly green (clayNightKellyBand) turns jade (clayNightJade). Pure integer tenths.
Implementation
int clayNightOperatorHue(int hue) {
final h = _wrap(hue);
const band = clayNightKellyBand;
if (!band.contains(h)) return h;
return _spread(clayNightJade, h - band.lo, band.hi - band.lo);
}