색상 변환기 - HEX, RGB, HSL, HSV 변환 온라인

// HEX to RGB
const hexToRgb = (hex) => {
  const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
  return result ? {
    r: parseInt(result[1], 16),
    g: parseInt(result[2], 16),
    b: parseInt(result[3], 16)
  } : null;
};

// RGB to HSL
const rgbToHsl = (r, g, b) => {
  r /= 255; g /= 255; b /= 255;
  const max = Math.max(r, g, b), min = Math.min(r, g, b);
  let h, s, l = (max + min) / 2;
  if (max === min) { h = s = 0; }
  else {
    const d = max - min;
    s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
    switch (max) {
      case r: h = ((g - b) / d + (g < b ? 6 : 0)) / 6; break;
      case g: h = ((b - r) / d + 2) / 6; break;
      case b: h = ((r - g) / d + 4) / 6; break;
    }
  }
  return { h: Math.round(h * 360), s: Math.round(s * 100), l: Math.round(l * 100) };
};

console.log(hexToRgb('#FF5733')); // { r: 255, g: 87, b: 51 }
console.log(rgbToHsl(255, 87, 51)); // { h: 11, s: 100, l: 60 }