Perceptually Uniform Palettes for Spectral Imagery — hsa

Returns colour ramps suitable for scientific imagery. All options are perceptually uniform and monotonic in lightness, so ordering survives greyscale printing and is legible to colourblind readers — which rules out the rainbow ramps that make striking but misleading figures.

Usage

hsa_palette(
  name = c("viridis", "magma", "inferno", "plasma", "cividis", "mako", "rocket", "turbo"),
  n = 256L,
  direction = 1
)

Arguments

name: Palette name. One of "viridis", "magma", "inferno", "plasma", "cividis", "mako", "rocket", "turbo".
n: Number of colours. Default 256.
direction: 1 (default) or -1 to reverse.

Value

A character vector of hex colours.

Examples

head(hsa_palette("magma", n = 5))
#> [1] "#000004FF" "#51127CFF" "#B63679FF" "#FB8861FF" "#FCFDBFFF"