Create a logo that is 512x512 square dimension in PNG format without animations. Suggested file size should be 10k or less. Use a lossy image tool (such as pngquant) to reduce file size while keeping the image quality at around 80%.
https://www.drupal.org/project/extra_field →
MAINTAINERS: The logo should be added to the root folder of the repo, and be named logo.png. This must be present on your project’s default branch. If you have a logo as the first image in the Images field on your project page, please remove it. The logo will be displayed on the cards in the Project Browser grid and list views.
1.0
Contrib changes
@urvashi_vora created the attached logo for Extra Field when it featured in the Drupal Advent Calendar.
I think this communicates the idea of “extra field” adequately and I think it’s taken from their own screenshots so this seems pretty good.