Following research reported by the authors to SID in 2017 and SPIE in 2018, this paperpresents an expanded set of research results for psychophysical research conducted todetermine of 255 Just Noticeable Color Differences (JNCDs). Given transmissivedisplays shall continue to create their color palette via color sub-pixel gray levels; giventhe number of such gray levels shall continue to be 255 (plus black) for most avionic,vetronic and shipboard applications, the authors propose to identify a set of gammavalues unique to a transmissive display’s three color channels and which conform to theintensity difference thresholds of the tritanoptic visual system. Method of research, toinclude procedure, equipment, stimuli and test subjects shall be identified. Results shallinclude raw data regarding psychophysically determined intensity difference thresholdsand a range of gammas for the red, green, and blue color channels of an hypothetic, JNDadapted, 256 gray level transmissive display.
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