How to Draw a Scroll

Books, before they were flat bound paper, were scrolls. If you're drawing something in an ancient setting, go for a scroll. Scrolls are also still used for religious texts like the Qur'an, or can be used to symbolise maps.

Use shading and grayish, brownish colors. Add little cracks and tears.

That depends on what kind of scroll you would like to draw. If drawing an old, forgotten one, go for neutral browns and greys, maybe adding some texture with shade. A more modern one would have clean and crisp colors, like white with a blue shade. If doing a rich, important scroll, try deep, expensive-looking colors such as dark purples and reds. Do what you think suits what you want to do!