CSS Library: Other: Here
Custom scrollbar colors
Author: Dynamic Drive
In IE5.5+ and above, you can use CSS to customize the color of the scrollbars on the page, which includes various components of the scrollbar. The below CSS shows the relevant CSS properties for scrollbar coloring. Note that if your page uses a valid doctype that triggers a "Strict" mode in IE, the scrollbar properties need to be assigned to the "HTML" tag instead of the conventional "BODY" in order to work. Due to this divergence in implementation, an easy solution is just to assign both the HTML and BODY tags the relevant scrollbar coloring CSS properties.
Scrollbar coloring via CSS is only supported in IE.