Paul Tol's Discrete Color Schemes for ggplot2 and ggraph
Source:R/scale_colour_tol.R
scale_tol_discrete.Rd
Provides qualitative color scales from Paul Tol's Colour Schemes.
Arguments
- ...
Arguments passed to
ggplot2::discrete_scale()
.- reverse
A
logical
scalar. Should the resulting vector of colors be reversed?- aesthetics
A
character
string or vector of character strings listing the name(s) of the aesthetic(s) that this scale works with.
Value
A discrete scale.
Interpolation
The qualitative color schemes are used as given (no interpolation): colors are picked up to the maximum number of supported values.
Qualitative Color Schemes
According to Paul Tol's technical note, the bright
, highcontrast
,
vibrant
and muted
color schemes are color-blind safe. The
mediumcontrast
color scheme is designed for situations needing color
pairs.
The light
color scheme is reasonably distinct for both normal or
colorblind vision and is intended to fill labeled cells.
The pale
and dark
schemes are not very distinct in either normal or
colorblind vision and should be used as a text background or to highlight
a cell in a table.
Refer to the original document for details about the recommended uses (see references).
References
Tol, P. (2021). Colour Schemes. SRON. Technical Note No. SRON/EPS/TN/09-002, issue 3.2. URL: https://personal.sron.nl/~pault/data/colourschemes.pdf
See also
Other color-blind safe color schemes:
scale_crameri_cyclic
,
scale_crameri_diverging
,
scale_crameri_mutlisequential
,
scale_crameri_sequential
,
scale_okabeito_discrete
,
scale_tol_diverging
,
scale_tol_sequential
Examples
data(mpg, package = "ggplot2")
ggplot2::ggplot(mpg, ggplot2::aes(displ, hwy, colour = class)) +
ggplot2::geom_point() +
scale_colour_bright()
ggplot2::ggplot(mpg, ggplot2::aes(displ, hwy, colour = class)) +
ggplot2::geom_point() +
scale_colour_vibrant()
data(diamonds, package = "ggplot2")
ggplot2::ggplot(diamonds, ggplot2::aes(clarity, fill = cut)) +
ggplot2::geom_bar() +
scale_fill_muted()