Mettilo in un CSS (style.css).
codice:
<!--
body.body {
scrollbar-3dlight-color: #999999; 
scrollbar-arrow-color: #000066;
scrollbar-base-color: #999999; 
scrollbar-darkshadow-color: #666666; 
scrollbar-face-color: #666666; 
scrollbar-highlight-color: #666666; 
scrollbar-shadow-color: #999999;
scrollbar-track-color: #999999; 
}
-->
Poi fai:
codice:
....
<link rel="stylesheet" style="text/css" href="style.css">
<body class="body">
...