Mesopic color appearance

Experiments were conducted to investigate colour appearance under mesopic vision. Lightness, colourfulness and hue observations of 40 test colours were accumulated for eight phases with four different luminance levels covering 0.1 to 90 cd/m2 and two different stimulus sizes corresponding to viewing angles of 2° and 10° using the magnitude estimation method. The psychophysical effects of luminance level and patch size on colour appearance were investigated and the role of the rods under mesopic vision was explored.