ametrine: Create a colorblind-safe vector of 'n' quasi-isoluminent...

In morgenstemning: Color schemes compatible with red-green color perception difficulties

Description

Create a colorblind-safe vector of n quasi-isoluminent colors.

Usage

ametrine(n = 256, mincolor = NULL, maxcolor = NULL, invert = FALSE,
  alpha = 1)

Arguments

n	the number of colors to be in the palette.
mincolor	a color with which to replace the lower end of the scale.
maxcolor	a color with which to replace the upper end of the scale.
invert	logical indicating whether the palette should be inverted.
alpha	the alpha transparency for the palette.

Details

The colormap is almost isoluminent and perceived by those with a red-green color perception deficiency as a roughly linear ramp between blue and yellow. However, the colormap has been enriched with a red control point for those with normal color vision. In order to improve contrast, this colormap is slightly unbalanced in luminence, unlike isolum.

Value

A character vector of color names. This can be used either to create a user-defined color palette for subsequent graphics by palette(cv), a col = specification in graphics functions or in par.

See Also

palettes and colors.

Examples

require(graphics)
# A color wheel
pie(rep(1,12), col=ametrine(12))

morgenstemning documentation built on May 2, 2019, 2:07 a.m.