Which of the following is not a unique hue?

Question

Quizplus · Accepted Answer

Magenta is not considered a unique hue because it does not correspond to a single wavelength of light. Unique hues are perceived as pure colors without any mixture of other colors, and include red, blue, green, and yellow, each of which corresponds to specific wavelengths. Magenta, however, is perceived when both the red and blue cones in the eye are stimulated but not the green. It does not have its own wavelength in the spectrum and is instead a mix of red and blue light.

Which of the Following Is Not a Unique Hue