palettes for the color-blind

Before you pick out a palette: ?you are aware that their are several
different types of color-blindness, aren't you?

Yes, but to first approximation there are only two, and they have
broadly similar, though not identical impact on choice of color
palettes.  The dichromat package knows about them, and so does
Professor Brewer.

More people will be unable to read your graphs due to some kind of
gross visual impairment (cataracts, uncorrected focusing problems,
macular degeneration, etc) than will have tritanopia or monochromacy.

   -thomas

Thomas Lumley
Professor of Biostatistics
University of Auckland