Tem como?
Ex:
<STYLE type="text/css"> BODY { scrollbar-face-color: XXXXXX; scrollbar-highlight-color: XXXXXX; scrollbar-3dlight-color: XXXXXX; scrollbar-darkshadow-color: XXXXXX; scrollbar-shadow-color: XXXXXX; scrollbar-arrow-color: XXXXXX; scrollbar-track-color: XXXXXX; } </STYLE>
[]'s