To cite package 'colourlovers' in publications use:

Thomas J. Leeper (2016). colourlovers: R client for the COLOURlovers API. R package version 0.2.2.

Corresponding BibTeX entry:

  @Manual{,
    title = {colourlovers: R client for the COLOURlovers API},
    author = {Thomas J. Leeper},
    year = {2016},
    note = {R package version 0.2.2},
  }