To cite package ‘colorBlindness’ in publications use:

Ou J (2021). colorBlindness: Safe Color Set for Color Blindness. R package version 0.1.9, https://CRAN.R-project.org/package=colorBlindness.

Corresponding BibTeX entry:

  @Manual{,
    title = {colorBlindness: Safe Color Set for Color Blindness},
    author = {Jianhong Ou},
    year = {2021},
    note = {R package version 0.1.9},
    url = {https://CRAN.R-project.org/package=colorBlindness},
  }