public static function Color::hexToRgb

Parses a hexadecimal color string like '#abc' or '#aabbcc'.

Parameters

string $hex: The hexadecimal color string to parse.

Return value

array: An array containing the values for 'red', 'green', 'blue'.

Throws

\InvalidArgumentException

File

includes/color.inc, line 42

Class

Color

Performs color conversions.

Code

public static function hexToRgb($hex) {
  if (!self::validateHex($hex)) {
    throw new \InvalidArgumentException("'$hex' is not a valid hex value.");
  }

  // Ignore '#' prefixes.
  $hex = ltrim($hex, '#');

  // Convert shorhands like '#abc' to '#aabbcc'.
  if (strlen($hex) == 3) {
    $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
  }

  $c = hexdec($hex);

  return array(
    'red' => $c >> 16 & 0xFF,
    'green' => $c >> 8 & 0xFF,
    'blue' => $c & 0xFF,
  );
}