Function roundToStep

packages/react-stately/src/color/useColorWheelState.ts:77–79

(value: number, step: number)

const DEFAULT_COLOR = parseColor('hsl(0, 100%, 50%)');

function roundToStep(value: number, step: number): number {
  return Math.round(value / step) * step;
}

function mod(n: number, m: number) {
  return ((n % m) + m) % m;