All patent application drawings require a sufficient number of views to constitute a complete disclosure of the subject matter of this application. For an application for a design patent, any suitable surface shadow or dotted line may be included to indicate the non-design elements that are not claimed in this application. Drawings usually need to be written in black ink on white paper. But if you show enough views, black and white photos can also meet the requirements. Color pictures or photographs can only be submitted if the US Patent and Trademark Office submits and approves the application and pays an additional fee.