parse only content from node containing CDATA using DOM

I am using php5 to parse node content from a xml file. Could someone show me
if it's possible to to print the content without the ![CDATA[]] tags in the
following codes ? Thank you in advance

....
$colors = $doc->getElementsByTagName("color");

foreach($colors as $node) {
// to print only 'red' without the ![CDATA[]] tags as in
![CDATA[red]]
// I have tried the following lines but none of them worked, just printed
out emptry string
echo $node->textContent;
echo $node->firstChild->nodeValue;
echo $node->firstChild->data;
}