Color schemes that work for people with color-deficient vision
On Tue, 02 Nov 2004 13:04:48 -0800, Scott Waichler
<scott.waichler at pnl.gov> wrote:
A recent article in the earth science literature cited below and available at http://geography.uoregon.edu/datagraphics/EOS/ points out that rainbow color schemes and mixtures of green and yellow can be troublesome for people with color-deficient vision. The authors propose alternative schemes that can be viewed and downloaded in RGB, HSV, CMYK, and RGB256 formats from http://geography.uoregon.edu/datagraphics/color_scales.htm. I have translated their RGB definitions into the hex color names given below.
Thomas Lumley has just written a couple of functions that make experimentation with scales like this a lot easier. They're currently in R-devel, and will appear in R 2.1.0 next spring. If you want to play with them before that, you can get the source and the docs from https://svn.r-project.org/R/trunk/src/library/graphics/R/colorRamp.R and https://svn.r-project.org/R/trunk/src/library/graphics/man/colorRamp.Rd Duncan Murdoch