The theme is designed for wide screen (1280px) and has a dark gray background (therefore the theme's name). There are 9 albums per page and 6 pictures par page. CSS3 is used to have a modern and light design.
Please note: This theme has been abandoned either by the Zenphoto team or its original 3rd party developer but we provide it for archival purposes on our "unsuppported" GitHub repository "as is". We may sometimes roughly update it for the current Zenphoto release but cannot promise full compatibility (See the circle icon about the status).
It is not possible to download individual themes from the GitHub repository. You have to download the full repository (click on "Download ZIP") and sort out what you need yourself.