are clearly shown in this diagram. 2. R 4/14 indicates a brilliant, intense red, and G 8/13 a light, gray green.

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A. The Hue Circuit.

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Another version of these relationships is found in 42 7B.

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B. The Value Scale.

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C. Chroma Steps.

D. Correlation of Three Dimensions of Color.

SCALE .8 International Printing Ink Corporation. New York City. "Color ia U*e" No. 3 of a Scric* of 3 Monograph* on Color, 193S

GRAPHIC PRESENTATION

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

VISIBILITY

^^^^H^^^^^^^^^^^^

VISIBILITY

Adapted from Whiting-Plover Paper Co., Stevent Point. Witcontin, "The U»e of Color," Founded on Studiet Originally Published in "Le Courrier du Livre."

RELATIVE VISIBILITY OF COLORS AT A DISTANCE A. To the Color Blind. B. To Normal Sight.

1. Dr. Edward A. Ayers says ir» "Color and Color Blindness," Century Ma/iaxine, April

1907, that one man in twenty and one woman in about two hundred are unable to see red and green normally.

2. The use of black on yellow for motor road signs and for advertising in poorly lighted

telephone booths may be traced to this investigation.

COLOR AND ITS USE

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These colors differ in hue.

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These colors differ in value.

Grace Cornfll. "■Color." Carter's Ink Company, Boston. Mass.. 1934.

A. Use of One Color with Black and White.

The use of red for emphasis on a black and white page is effective because of brightness, intensity and high contrast combined with a wave length on which the eye can focus easily at about reading distance.