In nature, colors average 4 parts black to 1 part white.There are two kinds of people in this world - those who like to be surprised and those who like to wait for what they know is going to happen.
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Middle Gray Isn't

Color Sensitivity

Our eyes are sensitive to different colors and to gray in different degrees.

Gray

It turns out that the color we usually think of as gray is not half way between black and white. It is actually far darker than you would guess. This gray is actually 4 parts black and only 1 part white.

This corresponds with some research done by Jones and Condit at Kodak in 1941 which found that the average scene in nature is about 4 parts black to 1 part white.

 

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