To cite viridis/viridisLite in publications use:

  Simon Garnier, Noam Ross, Robert Rudis, Antônio P. Camargo, Marco
  Sciaini, and Cédric Scherer (2023). viridis(Lite) -
  Colorblind-Friendly Color Maps for R. viridisLite package version
  0.4.2.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{viridis(Lite)} - Colorblind-Friendly Color Maps for R},
    author = {{Garnier} and {Simon} and {Ross} and {Noam} and {Rudis} and {Robert} and {Camargo} and Antônio Pedro and {Sciaini} and {Marco} and {Scherer} and {Cédric}},
    year = {2023},
    note = {viridisLite package version 0.4.2},
    url = {https://sjmgarnier.github.io/viridis/},
    doi = {10.5281/zenodo.4678326},
  }