HEX to RGB Converter

function hexToRgb(hex: string): { r: number; g: number; b: number } | null {
  const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
  const fullHex = hex.replace(shorthandRegex, (_, r, g, b) => r + r + g + g + b + b);

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

def hex_to_rgb(hex_str: str) -> tuple[int, int, int]:
    hex_clean = hex_str.lstrip('#')
    if len(hex_clean) == 3:
        hex_clean = ''.join(c * 2 for c in hex_clean)
    if len(hex_clean) != 6:
        raise ValueError("Invalid HEX length")
    return tuple(int(hex_clean[i:i+2], 16) for i in (0, 2, 4))

# Example usage:
print(hex_to_rgb("#3498DB")) # (52, 152, 219)

/* Legacy RGB notation */
.button-legacy {
  background-color: rgb(52, 152, 219);
}

/* Modern CSS Color Level 4 syntax with alpha */
.button-modern {
  background-color: rgb(52 152 219 / 75%);
}

function hexToRgb($hex) {
    $hex = ltrim($hex, '#');
    if (strlen($hex) == 3) {
        $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
    }
    list($r, $g, $b) = sscanf($hex, "%02x%02x%02x");
    return ["r" => $r, "g" => $g, "b" => $b];
}