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Colors_in_R.md

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Most functions either take a palette-generating function or a vector of colors.

palette_gen_func = grDevices::colorRampPalette(color_vector)
color_vector = palette_gen_func(n_colors)

It is common in R to start with a palette-generating function (like brewer.pal), generate a color vector and regenerate a palette-generating function.

Also not very commonly, there is a colorRamp function. More can be found here

pals (Recommended!)

This is a new collection with some of the most popular palette-generating functions, e.g., parula, turbo.

> brewer.paired(3) # this is the same as brewer.pal(3, "Paired") but allow more than 12 colors
> brewer.set1(3)
> brewer.set2(3)
> brewer.set3(3)

Also see the bivariate color from pals

BuenColors

grDevices

These are the default color palettes defined in R, including hcl.colors, rainbow, heat.colors, terrain.colors, topo.colors, cm.colors. use colors() to show the color names R knows about.

heat.colors(4, alpha=1)

RColorBrewer

A very popular package, that provides the brewer.pal() function. However, this package only provides one (though powerful) palette-generating function. The actual palette name is an argument to brewer.pal, such as Set1, Set2, Paired, Dark, Accent, Spectral, RdBu, YlGn, etc.

library(RColorBrewer)
par(mar=c(3,4,2,2))
display.brewer.all()
display.brewer.all(colorblindFriendly=TRUE)
brewer.pal(8,"Set3")
## [1] "#8DD3C7" "#FFFFB3" "#BEBADA" "#FB8072" "#80B1D3" "#FDB462" "#B3DE69"
## [8] "#FCCDE5"

colorspace

This a very popular package that provides diverge_hcl, diverge_hsl, terrain_hcl, sequential_hcl, rainbow_hcl, etc.

Here is a good tutorial on how to use it.

library(colorspace)
rainbow_hcl(4)
## "#E495A5" "#ABB065" "#39BEB1" "#ACA4E2“
diverge_hcl(7, h = c(246, 40), c = 96, l = c(65, 90))
pal <- choose_palette()
hcl_palettes("sequential (multi-hue)", n = 7, plot = TRUE)
sequential_hcl

package home

colorRamps

An old collection which hasn't been much maintained. But still sometimes used. provides matlab_like, matlab_like2, ygobb etc.

A Cheatsheet

ggsci

Some additional color palette used in popular journals.

Also see ggpubr

Specify color manually (not recommended)

rgb(r, g, b, maxColorValue=255, alpha=255)
hsv(h, s, v, alpha)
hcl(h, c, l, alpha)