[javascript] jQuery - adding elements into an array

I'm trying to add the ID's, which are the $hexcode values from the html span into an array. How do I do this with jQuery? Eventually, I'm going to need to grab these hexcode values and match them to a color index.

<?php
// display every color in the world

$r = 0;
$g = 0;
$b = 0;
$i = 0;
$step = 16;

for($b = 0; $b < 255; $b+=$step ) {
    for($g = 0; $g < 255; $g+=$step) {
        for($r = 0; $r < 255; $r+=$step) {
        $hexcolor = str_pad(dechex($r), 2, "0", STR_PAD_LEFT).str_pad(dechex($g), 2, "0", STR_PAD_LEFT).str_pad(dechex($b), 2, "0", STR_PAD_LEFT);
        echo '<span class="color_cell" id="'.$hexcolor.'" style="width: 5px; height: 5px; background-color:#'.$hexcolor.'; border: 1px dotted;">&nbsp;</span>'

        if($i%256 == 0) {
            echo "<br />";
        }
        $i++;
        }
    }

}
?> 
<script src="jquery-1.6.2.js"></script>
<script type="text/javascript">

var ids = [];

    $(document).ready(function($) {    
    $(".color_cell").bind('click', function() {
        alert('Test');
        //how do i add the ID (which is the $hexcolor into this array ids[]?
        ids.push($(this).attr('id'));       
    });
});

Thanks in advance!

var ids = [];

    $(document).ready(function($) {    
    $(".color_cell").bind('click', function() {
        alert('Test');

        ids.push(this.id);       
    });
});