To cite package ‘rockthemes’ in publications use:

MacKintosh J (2023). rockthemes: Colour palettes based on classic rock album covers. R package version 0.0.0.9000, https://github.com/johnmackintosh/rockthemes.

Corresponding BibTeX entry:

  @Manual{,
    title = {rockthemes: Colour palettes based on classic rock album
      covers},
    author = {John MacKintosh},
    year = {2023},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/johnmackintosh/rockthemes},
  }