To cite package ‘spectralscale’ in publications use:

Rogiers B (2020). spectralscale: A consistent set of Spectral-based palettes and scales. R package version 0.0.0.9000, https://github.com/rogiersbart/spectralscale.

Corresponding BibTeX entry:

  @Manual{,
    title = {spectralscale: A consistent set of Spectral-based palettes
      and scales},
    author = {Bart Rogiers},
    year = {2020},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/rogiersbart/spectralscale},
  }