Looking back in the day where IE 5.5, the Internet Explorer team introduced a set of non-standard CSS properties that allows users to customize scrollbars using the scrollbar-base-color from which you can use to make elements scroll. That’s being said, it is now much easier to do it using HTML5 and CSS3. Webkit now supports styling of the scrollbars in overflow sections, drop-down, menus and text areas.
Customize Your Scrollbars with CSS3 and jQuery | Heykuki News