To cite package ‘customthemes’ in publications use:

  Yanez Santibanez C (2024). _customthemes: custom theming for ggplot,
  for personal use_. R package version 0.0.1.0002,
  <https://github.com/carlosyanez/customthemes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {customthemes: custom theming for ggplot, for personal use},
    author = {Carlos {Yanez Santibanez}},
    year = {2024},
    note = {R package version 0.0.1.0002},
    url = {https://github.com/carlosyanez/customthemes},
  }