NEWS

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khroma 1.17.0.9000

khroma 1.17.0 (2025-09-29)

Enhancements

• Upgrade to Scientific Colours Maps v8.

khroma 1.16.0 (2025-02-25)

Enhancements

• Translate into French.

Internals

• Update package metadata.

khroma 1.15.0 (2025-01-10)

New functions

• Add palette_size_sequential() and palette_size_diverging() to size symbols.

Bugfixes & changes

• Silently deprecate palette_size_range().

khroma 1.14.0 (2024-08-26)

Enhancements

• Allow to pass a color function to palette_color_continuous() and palette_color_discrete().

khroma 1.13.0 (2024-07-01)

New functions

• Add palette_color_picker(), palette_color_continuous() and palette_color_discrete() to map values to colors.
• Add palette_shape() and palette_line() to map values to symbols.
• Add palette_size_range() to size symbols.
• Add change() to simulate color-blindness (#14).

Bugfixes & changes

• colour() no longer returns a named vector by default.
• plot*() functions invisibly return the first argument (vector of colors).
• Deprecate convert() (#14).
• Deprecate ramp().
• Remove deprecated argument in ggplot2::discrete_scale() and ggplot2::continuous_scale() (#15).

khroma 1.12.0 (2024-01-08)

New functions

• Add Paul Tol nightfall and incandescent color schemes.

Bugfixes & changes

• Fix discreterainbow scheme (qualitative scheme instead of sequential).

khroma 1.11.0 (2023-08-21)

Bugfixes & changes

• Fix ramp() to return a palette function with argument a vector of values that are mapped to colors.

Internals

• Use tinytest and tinysnapshot instead of testthat and vdiffr.

khroma 1.10.0 (2023-04-17)

Bugfixes & changes

• Add Okabe Ito colour scale with black at last position (#12, thanks to @ustervbo).

khroma 1.9.0 (2022-06-18)

New functions

• Add ramp() to produce a colour scheme that map a numeric vector to colours (allow rescaling to a specific midpoint).
• Add scale_*_logical() for logical values.

Bugfixes & changes

• Fix scale_colour_okabeito() and scale_fill_okabeito() (unnamed arguments were passed in the wrong order).

khroma 1.8.0 (2022-01-20)

New functions

• Add plot_tiles() to produce a diagnostic map for a given colour scheme.
• Add scale_*_picker() and scale_edge_*_picker() to build scales for ggplot2 and ggraph.
• Add ggraph scale functions scale_edge_colour_*() and scale_edge_fill_*() (#10).

Bugfixes & changes

• Fix test broken by testthat 3.1.2 (#11, thanks to @hadley).

khroma 1.7.0 (2021-09-02)

New functions

• Add Paul Tol's high and medium contrast colour schemes: scale_*_mediumcontrast and scale_*_highcontrast (#9).

Bugfixes & changes

• Deprecate scale_*_contrast.

khroma 1.6.0 (2021-06-14)

New functions

• Add info() to get a table of all available palettes.

Internals

• Move ggplot2, scales and spacesXYZ from Imports to Suggests (#8).

khroma 1.5.0 (2021-04-23)

New functions

• Add Fabio Crameri's Scientific colour schemes (35 new colour schemes).
• Add ggplot2 scale functions:
  • Diverging Colour Schemes: scale_*_broc, scale_*_cork, scale_*_vik, scale_*_lisbon, scale_*_tofino, scale_*_berlin, scale_*_roma, scale_*_bam, scale_*_vanimo.
  • Sequential colour schemes: scale_*_batlow, scale_*_batlowW, scale_*_batlowK, scale_*_devon, scale_*_lajolla, scale_*_bamako, scale_*_davos, scale_*_bilbao, scale_*_nuuk, scale_*_oslo, scale_*_grayC, scale_*_hawaii, scale_*_lapaz, scale_*_tokyo, scale_*_buda, scale_*_acton, scale_*_turku, scale_*_imola.
  • Multi-sequential colour schemes: scale_*_oleron, scale_*_bukavu, scale_*_fes.
  • Cyclic colour schemes: scale_*_brocO, scale_*_corkO, scale_*_vikO, scale_*_romaO, scale_*_bamO.

khroma 1.4.1 (2021-03-17)

Bugfixes & changes

• scale_*_sunset(), scale_*_BuRd() and scale_*_PRGn() gained a new argument to be used with discrete data (#7).
• Fix conflict with the name argument of ggplot2::discrete_scale() and ggplot2::scale_continuous().

khroma 1.4.0 (2020-10-05)

New functions

• Add a compare() function to compute CIELAB distance metric.
• Add a plot() function.
• Add a plot_scheme_colourblind() function (#4, thanks to @vincentarelbundock).
• Add Okabe and Ito (2008) colour scheme.

Bugfixes & changes

• Restrict the RGB values in the anomalize() function (#5, thanks to @vincentarelbundock).
• plot_scheme() now display colour for bad/missing data (if any).
• colour() output can be restricted to a fraction of the cheme's colour domain (#6).
• colour() gained a new argument to force interpolation of colour scheme.
• colour() gained a new argument to choose colour names language.
• scale_*_YlOrBr(), scale_*_iridescent() and scale_*_smoothrainbow() gained a new argument to be used with discrete data (#3).

Internals

• Move ggplot2 and scales from Suggests to Imports.

khroma 1.3.0 (2019-10-26)

Bugfixes & changes

• Fix qualitative colour picking.
• Fix typos in colour names (#2).
• Remove scale_*_rainbow().
• Use crayon if installed to nicely print colours in the console.

Internals

• Move ggplot2 and scales from Imports to Suggests.

khroma 1.2.0 (2019-08-19)

New functions

• Add the convert() function to simulate colour-blind vision.
• Add the plot_scheme() function to shows colours in a plot.
• Add the plot_map() function to produces a diagnostic map for a given colour scheme.

Bugfixes & changes

• Fix the argument (number of levels) of the palette function returned by colour().

Internals

• Add a vignette for Paul Tol's colour schemes.

khroma 1.1.3 (2019-06-05)

New functions

• Add three ggplot2 scale functions: scale_*_pale(), scale_*_dark() and scale_*_discreterainbow().

Bugfixes & changes

• The function scale_*_rainbow() is deprecated and replaced by scale_*_discreterainbow().
• Fix the missing attribute of the palette function returned by colour() (bug introduced in v1.1.2).

Internals

• The documentation is expanded with several remarks on the use of Paul Tol's colour schemes.

khroma 1.1.2 (2019-06-02)

New functions

• Add three ggplot2 scale functions: scale_*_contrast(), scale_*_iridescent() and scale_*_land().

Bugfixes & changes

• Add three colour schemes: Paul Tol's high contrast (qualitative), iridescent (sequential) and modified colour scheme for the AVHRR global land cover classification.
• Remove scale_*_tol().
• Remove arrange().

khroma 1.1.1 (2019-04-10)

Bugfixes & changes

• Midpoint can be specified in diverging colour scales.
• Colour schemes can be reversed (a bug made the reverse argument inoperative).

Internals

• Reduce required R version to 3.1.

khroma 1.1.0 (2019-02-24)

New functions

• Add specific ggplot2 scale functions for Paul Tol's colour schemes: scale_*_bright(), scale_*_vibrant(), scale_*_muted(), scale_*_light(), scale_*_rainbow() (qualitative), scale_*_sunset(), scale_*_BuRd(), scale_*_PRGn() (diverging), scale_*_YlOrBr(), scale_*_smoothrainbow() (sequential).

Bugfixes & changes

• The function scale_*_tol() is deprecated.
• Add the FAO Soil Reference Groups colour scheme.

khroma 1.0.0 (2018-10-19)

• First release (initial version on CRAN).