However, simply pointing to other people's images and including them on your page isn't enough either. They should enhance the readability, the visual attractiveness, of your page, of course, but they should also serve a purpose. Often, therefore, you will want or need to design your own images.
Colors also convey messages.
Of course, you should keep in mind that with the wide variety of browsers and user overrides, whatever colors you add to your page may not be what the viewer actually sees. Nonetheless, you will probably want to consider using colors, background .gifs, and other visual elements as part of your rhetorical structure. The actual structure of an HTML document includes more than we have so far addressed. In addition to the tags that open and close the document, there are other Document Structure Tags. For more information, see Sandia's description of META tags.