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Pick n evenly spaced colors from a rainbow data frame

Source: R/colors.R
get_colors.Rd

Three flavours are exported. They differ only in the post-processing they apply after picking equally-spaced rows from rgb_df:

Usage

get_colors(rgb_df, n_colors)

get_colors_plus(rgb_df, n_colors)

get_colors_duo(rgb_df, n_colors)

Arguments

rgb_df

A data frame with columns r, g, b, e.g. produced by rgb_colors_for_plot().

n_colors

Integer >= 2 – number of colors to return.

Value

A character vector of length n_colors with hex color codes ("#RRGGBB").

Details

  • get_colors() – no post-processing.

  • get_colors_plus() – every other color is darkened (x0.75) or lightened (towards 255 with weight 0.7), creating a strong duo pattern.

  • get_colors_duo() – every other color is darkened (x0.8) or lightened (weight 0.6), milder than the _plus variant.

Examples

rgb_df <- rgb_colors_for_plot()
get_colors(rgb_df, 5)
#> [1] "#00FF00" "#00BFFF" "#7F00FF" "#FF0040" "#FFFF00"
get_colors_plus(rgb_df, 6)
#> [1] "#00FF00" "#B2FFFF" "#0000FF" "#BF00BF" "#FF0000" "#FFFFB2"
get_colors_duo(rgb_df, 6)
#> [1] "#99FF99" "#00CCCC" "#9999FF" "#CC00CC" "#FF9999" "#CCCC00"