them: minima Minima is a one-size-fits-all Jekyll theme for writers. It's Jekyll's default (and first) theme. It's what you get when you run jekyll new.
Disclaimer: The information here may vary depending on the version you're using. Please refer to the README.md bundled within the theme-gem for information specific to your version or by pointing your browser to the Git tag corresponding to your version. e.g. https://github.com/jekyll/minima/blob/v2.5.0/README.md Running bundle show minima will provide you with the local path to your current theme version.