Add this to your css style sheet or if you don’t have one you can add it to your head tags.
Change the colors to that of your own likings.
BODY
{
scrollbar-arrow-color: #FFFFFF;
scrollbar-track-color: #FFFFFF;
scrollbar-face-color: #444444;
scrollbar-highlight-color: #FFFFFF;
scrollbar-3dlight-color: #000000;
scrollbar-darkshadow-color: #000000;
scrollbar-shadow-color: #444444;
}
