palr provides colour palettes for data, based on some well known remotely sensed data sets for sea ice concentration, sea surface temperature and chlorophyll-a. It includes function image_pal() to create the data used by the image() function as colours.

There are five main ways of working with palr palette functions, which have names like ice_pal(), chl_pal() and sst_pal() for ice, chlorophyll-a and sst respectively and mk_timePal for creating a time-mapped palette function.

  • ice_pal(n) return n colours from the palette
  • ice_pal(data) return the right colour for values in data
  • ice_pal(palette = TRUE) returns the entire palette, with colours cols and intervals breaks
  • tfun <- mk_timePal(datetimes, pal); plot(x, tfun(dt)) match date-times to a palette, or palette function.
  • image_pal(data, col = colors, breaks = breaks) emulates the behaviour of image() but return colours as data rather than draw a plot

See the website for documentation:


Install the current release from CRAN using

To install the development version:


Please note that the palr project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.