This page/section is to hold logos and designs made for the Drupal documentation team. These will be used on things like blog posts or slides by community members who are talking about Drupal docs. We don't need "just one" logo, as we'd like to have a variety of images for folks to choose from, depending on what they like. This is for fun and not "official" in any way.
If you would like to submit an image for use, just edit the page and upload it! Preferably, you should upload a PNG as well as the source files.