To cite package ‘hrbrthemes’ in publications use:

  Rudis B (2025). _hrbrthemes: Additional Themes, Theme Components and
  Utilities for 'ggplot2'_. R package version 0.90,
  <https://github.com/hrbrmstr/hrbrthemes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hrbrthemes: Additional Themes, Theme Components and Utilities for 'ggplot2'},
    author = {Bob Rudis},
    year = {2025},
    note = {R package version 0.90},
    url = {https://github.com/hrbrmstr/hrbrthemes},
  }