To cite package ‘colorr’ in publications use:

Crabtree C (2017). colorr: Color Palettes for EPL, MLB, NBA, NHL, and NFL Teams. R package version 1.0.0, https://github.com/cdcrabtree/colorr.

Corresponding BibTeX entry:

  @Manual{,
    title = {colorr: Color Palettes for EPL, MLB, NBA, NHL, and NFL
      Teams},
    author = {Charles Crabtree},
    year = {2017},
    note = {R package version 1.0.0},
    url = {https://github.com/cdcrabtree/colorr},
  }