[R] Creating a vector of colours that are as different from

[Deborah Swayne]

Spencer Graves writes:
 >       There should be a caveat with psycho-visual experimentation:  
 > Tufte (1983, p. 183) says that 5-10 percent of viewers are color 
 > deficient or color blind. 

The vischeck.com web site provides examples that show color-normal
people what the world looks like to people with different color
deficiencies; I found it fascinating.  It even allows you to submit
your own graphics to get an idea what they might look like to others.
Now I might not have to bother my friend down the hall so often ...

Debby