function rgbToHsv(rgb) {
  let [r, g, b] = rgb;
  const v = Math.max(r, g, b) / 255;
  
  if (v === 0) {
    return Array.of(0, 0, 0);
  }
  
  r /= v;
  g /= v;
  b /= v;
  
  const s = 1 - Math.min(r, g, b) / 255;
  
  if (s === 0) {
    return Array.of(0, 0, v * 100);
  }
  
  r = 255 - (255 - r) / s;
  g = 255 - (255 - g) / s;
  b = 255 - (255 - b) / s;
  
  const peak = Math.max(r, g, b);
  
  let h = 0;
  
  if (r === peak) {
    h = g < b ? 360 - b * 60 / 255 : g * 60 / 255;
  } else if (g === peak) {
    h = r > b ? 120 - r * 60 / 255 : 120 + b * 60 / 255;
  } else {
    h = r > g ? 240 + r * 60 / 255 : 240 - g * 60 / 255;
  }
  
  return Array.of(Math.round(h), Math.round(s * 100), Math.round(v * 100));
}