Помощь в css

function cmsKarmaFormat($points){
	if ($points==0) {
		$html = '<span style="color:silver;">0</span>';
	} elseif ($points>0){
		$html = '<span style="color:green;">+'.$points.'<span style="color:silver">&#8593;</span></span>';
	} else {
		$html = '<span style="color:red;">'.$points.'<span style="color:silver">&#8595;</span></span>';
	}
	return $html;
}