I don't necessarily want to change the color (although, why not?), I mostly just want to change the width of the bar. Having a huge, fat, white and grey scroll-bar on an overflowed `div` right in the middle of my sleek, dark-themed site with integrated 3D (both CSS and WebGL) elements just sticks out more than a huge, swollen thumb. For now I've set `direction: rtl;` so that it blends into the left-side of the page and is hopefully overlooked by most people.