Prova questo:

<style>
<!--
BODY {
filter: Alpha(Opacity=50, FinishOpacity=0);
scrollbar-face-color:#010101;
scrollbar-shadow-color:#111030;
scrollbar-highlight-color:#111030;
scrollbar-3dlight-color:#c0c0c0;
scrollbar-darkshadow-color:#c0c0c0;
scrollbar-track-color:#010101;
scrollbar-arrow-color:#ff0000;
}
--></style>