To cite package ‘ltc’ in publications use:

  Loukas Theodosiou, Kristian Ullrich (2026). _ltc: Collection of
  Artistic and Nature-Inspired Color Palettes_. R package version
  0.3.0, <https://github.com/loukesio/ltc-color-palettes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ltc: Collection of Artistic and Nature-Inspired Color Palettes},
    author = {{Loukas Theodosiou} and {Kristian Ullrich}},
    year = {2026},
    note = {R package version 0.3.0},
    url = {https://github.com/loukesio/ltc-color-palettes},
  }