Rastgele Link Rengi Üretmek

<?php
echo '<'.'style type="text/css"'.'>';
function rengi_ters_cevir($color){
    $color = str_replace('#', '', $color);
    if (strlen($color) != 6){ return '000000'; }
    $rgb = '';
    for ($x=0;$x<3;$x++){
        $c = 255 - hexdec(substr($color,(2*$x),2));
        $c = ($c < 0) ? 0 : dechex($c);
        $rgb .= (strlen($c) < 2) ? '0'.$c : $c;
    }
    return '#'.$rgb;
}
$ToplamLinkSayisi=3;
for($x=1;$x<$ToplamLinkSayisi+1;$x++){
    $colorno=rand(0,10000000);
    $bgno=10000000-$colorno;
    echo 'a:nth-child('.$x.'n){';
    echo 'color: #'.strtoupper(dechex($colorno)).';';
    echo 'background-color: '.rengi_ters_cevir('#'.strtoupper(dechex($colorno))).';';
    echo '}
    ';
}
echo '<'.'/style'.'>';
echo '<a href="#1">1.Link</a>';
echo '<a href="#2">2.Link</a>';
echo '<a href="#3">3.Link</a>';
?>
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