The uses of colour vision: behavioural and physiological distinctiveness of colour stimuli.
Andrew M Derrington, Amanda Parker, Nick E Barraclough, Alexander Easton, G R Goodson, Kris S Parker, Chris J Tinsley, and Ben S Webb
Philos Trans R Soc Lond B Biol Sci. 2002 August 29; 357(1424): 975–985. doi: 10.1098/rstb.2002.1116.PMCID: PMC1693019