Color palettes extracted from the Albums de Statistique Graphique produced under the direction of Émile Cheysson. These palettes are organized by album year and plate number.
Format
A list of 25 color palettes, each containing:
- colors
Character vector of hex color codes
- type
Palette type: "sequential", "diverging", "grouped", or "category"
- album
Year of the album
- plate
Plate number within the album
- rumsey_no
David Rumsey collection reference number
- dec_day
Advent calendar day from original source
Source
Color patterns digitized by RJ Andrews from the David Rumsey Map Collection https://github.com/infowetrust/albumcolors
Observable implementation by Tom Shanley https://web.archive.org/web/20210130125506/https://observablehq.com/@tomshanley/cheysson-color-palettes
Details
The palettes are named using the convention YYYY_PP where YYYY is the
album year and PP is the zero-padded plate number. For example, "1880_07"
refers to plate 7 from the 1880 album.
Palette types:
Sequential (7 palettes): Ordered colors for quantitative data
Diverging (2 palettes): Two contrasting colors with neutral midpoint
Grouped (10 palettes): Related colors for comparing groups
Category (6 palettes): Distinct colors for categorical data
Examples
# List available palettes
names(cheysson_palettes)
#> [1] "1880_07" "1880_21" "1881_12" "1881_14" "1881_22" "1881_30" "1882_18"
#> [8] "1883_13" "1883_21" "1883_31" "1886_11" "1886_17" "1886_18" "1886_24"
#> [15] "1886_26" "1886_28" "1887_22" "1888_27" "1891_14" "1891_19" "1891_25"
#> [22] "1895_16" "1900_28" "1906_06" "1906_50"
# Get colors from a specific palette
cheysson_palettes$`1880_07`$colors
#> [1] "#655564" "#c5602a" "#d8af4a" "#4e6c76" "#cc575e"
# Find palettes by type
sequential_pals <- Filter(function(x) x$type == "sequential", cheysson_palettes)
names(sequential_pals)
#> [1] "1881_12" "1886_26" "1888_27" "1891_19" "1891_25" "1895_16" "1900_28"