The human eye is more sensitive to green light than red and blue. This is why the Bayer matrix in digital camera sensors contains twice as many green photocells as red or blue.
Color blindness is likely a relative term, with no two people experiencing exactly the same degree of color perception failure. It appears that men are more prone to color blindness than women ... another genetic quirk.
When viewing any colored object, we must consider the color temperature of the light illuminating the object, as it will have a great effect on how we perceive the color of the object. We must also consider the difference between reflected light (something illuminated with one or more lights of a single or multiple color temperatures) and transmitted light (from a television set or computer monitor).
Thanks for your comments.
HBB in Phoenix, Arizona Nikonian Team Member
Photography is a journey with no conceivable destination.