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Colour palettes

Source: R/palette.R
pal_okabe_ito.Rd

pal_okabe_ito() returns the nine colours of the Okabe-Ito palette (Okabe & Ito 2008), safe for colour-blind readers. pal_levels() gives one colour per level of a factor.

Usage

pal_okabe_ito()

pal_levels(levels, palette = NULL)

Arguments

levels

Levels (character or factor levels) to colour.

palette

See Details.

Value

A named character vector of hexadecimal colours.

Details

palette in pal_levels() can be:

  • NULL: Okabe-Ito colours (orange, sky blue, green, vermillion, blue, pink, yellow, grey), interpolated when there are more levels;

  • a named vector covering every level: returned as is (in level order);

  • an unnamed vector of colours, used in order (interpolated if too short);

  • the name of a palette: "okabe", one of grDevices::hcl.pals(), grDevices::palette.pals() or an RColorBrewer palette;

  • a function of the number of colours, e.g. grDevices::rainbow.

References

Okabe M, Ito K (2008). Color Universal Design (CUD): how to make figures and presentations that are friendly to colorblind people.

Examples

pal_okabe_ito()
#>     orange    skyblue      green     yellow       blue vermillion       pink 
#>  "#E69F00"  "#56B4E9"  "#009E73"  "#F0E442"  "#0072B2"  "#D55E00"  "#CC79A7" 
#>       grey      black 
#>  "#999999"  "#000000" 
pal_levels(c("Placebo", "Active"))
#>   Placebo    Active 
#> "#E69F00" "#56B4E9" 
pal_levels(c("A", "B", "C"), palette = "Dark 3")
#>         A         B         C 
#> "#E16A86" "#50A315" "#009ADE" 
pal_levels(c("Low", "High"), palette = c(Low = "grey70", High = "firebrick"))
#>         Low        High 
#>    "grey70" "firebrick"