A higher percentage of males have colour sight deficiencies than
female. better not argue :).
The colour balance of the illuminating light will also effect your
perception of colour.
I have had to take a number of colour sight tests due to my work in the past.
and as for
"On a slightly relevant note, consider 2 colour photocopiers. If you
photocopy the same colour image on both, do both copiers give exactly the
same output colourwise?"
unlikely as the setup can be different and the makeup of the inks
needs calibrating.
Transforming from one colour set to another including is fraught with
difficulties due to
the actual values (hue,luminace) of red,green,blue (for additive mixing)
and cyan,magenta,yellow) (subtractive mixing) and the fact that the
colour triangle of a
subtractive print system cannot print all the colours that a monitor
can display.
It is not a simple inversion as some think, one has to calibrate and
use the measured values in conversion routines.
For fun display a grey scale on the monitor, print it, look for off
grey in places (no cheating by using black)
this is one of the reasons why better printers have a black and more
than 3 colour inks.
Dave Caroline