Layout Designs are the underlying structure of your site. The “what things go where” part. Any genre can work on any of these layouts.
Base Color Schemes are used for things like Heading text colors, link text colors, highlighting colors, etc.
Background image is where you can really start tying your site to your genre – this can easily be changed out later, but choose one that resonates with you and fits with the genre you write in. You may also choose a royalty-free background image of your choice from websites such as: Pixabay, Pexels, or UnSplash and provide the link to the image.