In general, the technology relates to a method for using reusable themes. The method includes receiving, from a device, a request for a style sheet language file, where the style sheet language file defines a reusable theme for a webpage and specifies a relative location for an image that is used by the reusable theme. The method further includes receiving a request for the image including the relative location of the image, resolving the relative location for the image to obtain an absolute location for the image using a location of the style sheet language file in a web application structure, obtaining the image from the absolute location of the image, and providing the image to the device.