To cite package ‘prismatic’ in publications use:

  Hvitfeldt E (2024). _prismatic: Color Manipulation Tools_. R package
  version 1.1.2.9000, , <https://github.com/emilhvitfeldt/prismatic>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {prismatic: Color Manipulation Tools},
    author = {Emil Hvitfeldt},
    year = {2024},
    note = {R package version 1.1.2.9000, 
},
    url = {https://github.com/emilhvitfeldt/prismatic},
  }