Color sense

[Joshua T]

Except this site seems to suggest that we see purple ("a nonspectral
colour") when we get wavelengths from the (quite separate) red and blue
ranges, in contrast to violet, which we see when we get wavelengths from
just the violet range.  http://www.jps.net/rhys/purple.html
Course, the violets here look plenty mauve to me
http://www.photo.net/photo/edscott/spectrum.jpg
and I've heard that "violets are blue," so maybe it's just a verbal dispute?

Josh