how do you do it?

this is my code at the moment:

{ scrollbar-face-color : #000000;
scrollbar-highlight-color : #FFFFFF;
scrollbar-3dlight-color : #000000;
scrollbar-shadow-color : #000000;
scrollbar-darkshadow-color : #000000;
scrollbar-track-color : #333333;
scrollbar-arrow-color : #FFFFFF;

For the page or for an Iframe? Is that all of the code for it?

i don't believe it's possible for a regular webpage [i searched around and found nothing] but if it's an iframe go here and scroll down: www.lissaexplains.com/frames.shtml

in the <iframe> tag you place:

style="filter: alpha(color=#CECECE)"

Then you place the scrollbar coding on the pages that open INSIDE the iframe and make all parts that have to be transparent the color #CECECE

Love,
Mirna