Theme::convertHexToRgb

static function convertHexToRgb(string $hexColor): array
{
	if ($hexColor[0] !== '#')
	{
		$hexColor = '#'.$hexColor;
	}
	if (strlen($hexColor) === 4)
	{
		$hexColor =
			$hexColor[0] . $hexColor[1] . $hexColor[1] . $hexColor[2] . $hexColor[2] . $hexColor[3] . $hexColor[3];
	}
	if (strlen($hexColor) !== 7)
	{
		$hexColor = self::DEFAULT_COLOR;
	}

	return [
		hexdec(substr($hexColor, 1, 2)),
		hexdec(substr($hexColor, 3, 2)),
		hexdec(substr($hexColor, 5, 2)),
	];
}