An August 2016 Stanford University study published in Acta Ophthalmologica found that "the birth prevalence of iris color was 63 percent brown, 20.8 percent blue, 5.7 percent green/hazel." ...

“Colors are often represented in HSL (hue, saturation, lightness) color space,” Mineault explained to the Daily Mail. “Hue 120 is green, and hue 240 is blue.

When M cones were stimulated, the color "olo" (a.k.a. "0, 1, 0"), based on the Oz's 3D color map was discovered. The new color is described as a blue-green color with saturation cranked way up.