Economist sequential color palettes

The "equal lightness colour scales" of The Economist visual styleguide (v1.2, 4 May 2017): six ordered steps for each of nine hues, running darkest to lightest. Use them for ordered data. They come from the paper's 2017 chart design, not the classic design of economist_pal() and theme_economist().

Usage

economist_seq_pal(hue = "blue")

economist_gradient_pal(hue = "blue")

Arguments

hue

A string, the hue of the color scale. One of "blue" (the default), "cyan", "green", "yellow", "olive", "purple", "gold", "gray", or "red".

Value

economist_seq_pal() returns a palette function that takes the number of colors n and returns the first n of the six hex colors for hue, for use with ggplot2::discrete_scale(). economist_gradient_pal() returns a palette function that takes a numeric vector x of values between 0 and 1 and returns hex colors interpolated between those steps, for use with ggplot2::continuous_scale().

Details

economist_seq_pal() returns the six steps themselves, for discrete ordered data. economist_gradient_pal() interpolates between them, for continuous data.

See also

Other color economist: economist_pal(), scale_colour_economist(), scale_colour_economist_c()

Examples

library("scales")

# the six steps of one hue, darkest first
show_col(economist_seq_pal("blue")(6))

show_col(economist_seq_pal("red")(6))


# interpolated for continuous data
show_col(economist_gradient_pal("green")(seq(0, 1, length.out = 10)))