The Palmetto theme uses a grid layout on multiple theme pages. By default, the featured image (if set) is used as a graphic on this grid. If no graphic is specified, one can set a website-specific placeholder.
The theme comes with a default placeholder image in greyscale meant to match any user-specified theme colors. These are located at assets/img/dft-placeholder-blog.jpg, for the blog placeholder image, and assets/img/dft-placeholder-listing.jpg, for the listing placeholder image. These images were made using Canva and the template can be found on my pblic profile page at https://www.canva.com/chrissybranso. These images can be customized to suite your specific theme colors. To use these images, upload them to wordpress, and changed in the WordPress customizer. More information about this can be found on the Palmetto Customizer Options post.
