To cite package ‘charisma’ in publications use:

  Schwartz S, Tsai W, Karan E, Juhn M, Shultz A, McCormack J, Smith T,
  Alfaro M (2026). _charisma: Reproducible Color Characterization of
  Digital Images for Biological Studies_. R package version 1.0.0,
  <https://github.com/shawntz/charisma>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {charisma: Reproducible Color Characterization of Digital Images for
Biological Studies},
    author = {Shawn Schwartz and Whitney Tsai and Elizabeth Karan and Mark Juhn and Allison Shultz and John McCormack and Thomas Smith and Michael Alfaro},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://github.com/shawntz/charisma},
  }