The house palette for categorical groups

Colors for categorical groups in a manuscript, poster or light-background slide figure: the Okabe-Ito colors, ordered for a white background, with every one clearing 3:1 contrast against white. Hand it to a manual scale, scale_color_manual(values = hv_palette()).

Usage

hv_palette(n = NULL)

Arguments

n

Number of colors to return, or NULL (default) for all six.

Value

A character vector of hex colors, in group order.

Details

This is the categorical half of the house color rule. Ordered and diverging scales take ColorBrewer "RdBu" or "PuOr" through ggplot2::scale_color_brewer(), and sequential scales take "Blues". Avoid "Set1" and "RdYlGn": their red against green fails for a reader with deuteranopia.

The colors are those of hv_ppt_palette("light"), under a name that does not tie a manuscript figure to slides. For a dark slide, use hv_ppt_palette("dark"). Six colors are supplied, and asking for more is an error rather than a silently recycled palette.

See also

hv_ppt_palette() for the slide orderings, hv_role_palette() when levels carry a role such as event or censored.

Examples

hv_palette()
#> [1] "#0072B2" "#D55E00" "#009E73" "#CC79A7" "#9D952B" "#000000"
hv_palette(n = 3)
#> [1] "#0072B2" "#D55E00" "#009E73"