FYI http://en.wikipedia.org/wiki/Color_blindness
further reading: http://www.inf.ufrgs.br/~oliveira/pubs_files/CVD_Simulation/CVD_Simulation.html http://www.inf.ufrgs.br/~oliveira/pubs_files/CVD_PCA/CVD_PCA.html
http://vision.psychol.cam.ac.uk/jdmollon/papers/Dichromatsimulation.pdf http://vision.psychol.cam.ac.uk/jdmollon/papers/colourmaps.pdf
http://scien.stanford.edu/class/psych221/projects/05/ofidaner/project_report.pdf http://scien.stanford.edu/pages/labsite/2005/psych221/projects/05/ofidaner/conv_img.m
Note: use web.archive.org for old links