Trivia – Color

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Vision Facts of the Month

• The cornea is the only living tissue in the human body that does not contain any blood vessels.
• The eye of a human can distinguish 500 shades of the gray.

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National Color Day – Celebrate Your Vision

Celebrate by caring for your eyesight.Color and our perception of it

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Vision Care – Colors Explained

photo credit: Sami Keinänen
OK, For Those Who Are Interested In The Science Of Color!

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Simultaneous Contrast

Equinox, Hans Hofmann, 1958. Note how the contrasting colors create energetic forms, which Hofmann famously termed “push and pull.”

Two colors, side by side, interact with one another and change our perception accordingly. The effect of this interaction is called simultaneous contrast. Since we rarely see colors in isolation, simultaneous contrast affects our sense of the color that we see. For example, red and blue flowerbeds in a garden are modified where they border each other: the blue appears green and the red, orange. The real colors are not altered; only our perception of them changes. This effect has a simple scientific explanation that we will uncover.

Simultaneous contrast is most intense when the two colors are complementary colors.

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Complementary colors are pairs of colors, diametrically opposite on a color circle: as seen in Newton’s color circle, red and green, and blue and yellow. Yellow complements blue; mixed yellow and blue lights generate white light.

Impressionist interest in color and light is influenced in part by the research of scientists like Michel Chevreul. Specifically, the idea that an object of any given color will cast a shadow tinged with that of its complementary color and tinting neighboring colors in the same manner influences Impressionists. This theory was already known to earlier painters, such as Eugène Delacroix.

A primary color such as red has green (the combination of the other two primaries) as its complementary. Similarly, blue has orange and yellow has purple as a complementary color.
Artists have always explored the effects of juxtaposing complementary colors, even without understanding it in neurophysiological terms. Few artists have dramatically used complementary colors as has Vincent van Gogh (1853-1890). Both works were painted in Arles in 1888.

Red and green accentuate each other in van Gogh’s Night Café in Arles, which was painted the same month as the café at left.

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