I am trying to design an optimal colormap for display interval data. I would like to create a scale that is linear in perceived luminance while adding a hue component to help mitigate the simultaneous contrast effect. However, I am confused on what hue to pick. The longest curved path I get through CIELAB space that is still in the sRGB gamut is with hue=325 degrees -- that gives me a path where the chroma is maximized. On the other hand, several different sources tell me that the human eye is most sensitive to yellow-green (http://deron.meranda.us/ruminations/purple/ http://www.physicsclassroom.com/class/light/u12l2b.cfm) or magenta (http://www.atmos.ucla.edu/~fovell/AS3/theory_of_color.html [Broken]). What is actually the correct transfer function? Additionally, Pizer and Zimmerman in "Color display for ultrasoundography" say the human visual system is most sensitive to luminance changes in orange-yellow hues but humans are most sensitive to hue changes in magenta, but they list no sources.