cbPalettes: Palettes compatible with colour blindness

In PlotTools: Extended Tools for Continuous Legends, Polygon Manipulation, and Visual Display of Categorical Data

Palettes compatible with colour blindness

Description

Colour palettes whose elements are chosen to be distinguishable by colour blind audiences.

Usage

cbPalette8

cbPalette12

cbPalette15

cbPalette24

altPalette8

altPalette12

altPalette15

altPalette24

Format

Named character vectors listing RGB values for each colour.

An object of class character of length 8.

An object of class character of length 12.

An object of class character of length 15.

An object of class character of length 24.

An object of class character of length 8.

An object of class character of length 12.

An object of class character of length 15.

An object of class character of length 24.

Details

Palettes are named according to the number of distinct colours they contain.

Each palette is arranged in three groups, intended to achieve perceptual luminance uniformity for deuteranopic viewers (see source for details), from dark to light.

For each cbPalette, an altPalette provides a hue selected from the many that are perceptually indistinguishable for deuteranopic viewers.

Source

https://mk.bcgsc.ca/colorblind/palettes.mhtml

See Also

palette.colors(8) provides an eight-colour Okabe-Ito colour-blind palette.

Examples

par(mfrow = c(4, 1), mar = rep(1, 4))

data("cbPalette8")
plot.new()
plot.window(xlim = c(1, 8), ylim = c(-1, 1))
text(1:8, 1, col = cbPalette8)
points(1:8, rep(0, 8), bg = cbPalette8, col = altPalette8,
       pch = 22, cex = 2)

data("cbPalette12")
plot.new()
plot.window(xlim = c(1, 12), ylim = c(-1, 1))
text(1:12, 1, col = cbPalette12)
points(1:12, rep(0, 12), bg = cbPalette12, col = altPalette12,
       pch = 22, cex = 2)

data("cbPalette15")
plot.new()
plot.window(xlim = c(1, 15), ylim = c(-1, 1))
text(1:15, 1, col = cbPalette15)
points(1:15, rep(0, 15), bg = cbPalette15, col = altPalette15,
       pch = 22, cex = 2)

plot.new()
plot.window(xlim = c(1, 25), ylim = c(-1, 1))
text(1:24, 1, col = cbPalette24)
points(1:24, rep(0, 24), bg = cbPalette24, col = altPalette24,
       pch = 22, cex = 2)

PlotTools documentation built on Jan. 29, 2026, 5:07 p.m.