brewer-palette

Look up a ColorBrewer palette by name.

Returns the canonical colour array for the named palette. Panics with a clear message if the name is unknown.

Usage

brewer-palette(
  name,
)

Parameters

Parameter	Default	Description
name		Palette name, e.g., "Set1", "Spectral", "Blues".

Returns

Array of color values.

Examples

Look up the Set1 palette and feed it into a manual fill scale rendered as swatches via geom-rect.

#let pal = brewer-palette("Set1")
#let d = pal.enumerate().map(((i, _)) => (
  xmin: i, xmax: i + 1, ymin: 0, ymax: 1, k: str(i),
))
#plot(
  data: d,
  mapping: aes(xmin: "xmin", xmax: "xmax", ymin: "ymin", ymax: "ymax", fill: "k"),
  layers: (geom-rect(),),
  scales: (scale-fill-manual(values: pal),),
  guides: guides(fill: guide-none()),
  width: 8cm,
  height: 1cm,
)

The diverging Spectral palette laid out as swatches; the same pattern works for any qualitative, sequential, or diverging name.

#let pal = brewer-palette("Spectral")
#let d = pal.enumerate().map(((i, _)) => (
  xmin: i, xmax: i + 1, ymin: 0, ymax: 1, k: str(i),
))
#plot(
  data: d,
  mapping: aes(xmin: "xmin", xmax: "xmax", ymin: "ymin", ymax: "ymax", fill: "k"),
  layers: (geom-rect(),),
  scales: (scale-fill-manual(values: pal),),
  guides: guides(fill: guide-none()),
  width: 8cm,
  height: 1cm,
)