Webkit Scrollbar CSS
If you find yourself developing a Chrome App or want to enhance an experience from the default browser behavior, webkit lets you define a skin to override the OS stylesheet. You can use any css attribute to style the scrollbars including CSS3 gradients
::-webkit-scrollbar {
background: #303030;
border: 1px solid #292929;
height: 8px;
width: 8px;
}