To cite package ‘shades’ in publications use:

Clayden J (2026). shades: Simple Colour Manipulation. R package version 1.5.0, https://github.com/jonclayden/shades.

Corresponding BibTeX entry:

  @Manual{,
    title = {shades: Simple Colour Manipulation},
    author = {Jon Clayden},
    year = {2026},
    note = {R package version 1.5.0},
    url = {https://github.com/jonclayden/shades},
  }