RegistrationValidator::validateColor

public function validateColor(): self
{
	if (
		$this->placementBind['OPTIONS']['color'] !== ''
		&& !array_key_exists($this->placementBind['OPTIONS']['color'], Color::getColors())
	)
	{
		$this->result['error'] = 'INVALID_ERROR_COLOR';
		$this->result['error_description'] = 'Field color is invalid.';
	}

	return $this;
}