Palettes of dissimilar colors in RGB space. — distant

Many standard palette generators use only a slice of color space, which can cause a lack of differentiability in palettes used to visualize categorical factors with many levels. This function attempts to overcome this by generating colors using nearest-neighbor distance maximization in 3D RGB space.

Usage

distant_colors(
  n,
  res = 20,
  maxreps = 1000,
  radius = 10,
  avoid_white = TRUE,
  seed = NULL
)

Arguments

n: Number of colors (integer).
res: Number of distinct values in each RGB dimension (integer).
maxreps: Max number of optimization iterations (integer).
radius: Neighborhood size for potential moves, analagous to heating.
avoid_white: Logical, default is TRUE.
seed: Integer used to seed randomization during search; leave as NULL to generate different results each time, or set a value to generate reproducible results.

Value

Character vector of colors.

Examples

plot(runif(20), runif(20), 
     col = distant_colors(20), 
     pch = 16, cex = 3)