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Color, Form, and Distance

Understand the intricacies of color perception, wavelengths, and vision theories. Learn about the color spectrum, color vision types, and the Trichromatic and Opponent-Process theories. Discover how colors are perceived and why some individuals experience colorblindness.

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Color, Form, and Distance

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  1. Color, Form, and Distance

  2. Color • The color of an object is determined by the wavelengths of light that object absorbs and reflects. • When you paint an object, you are applying a pigment that selectively absorbs and reflects different wavelengths.

  3. Color • Color is an illusion. Your brain tells you that things have color. All color wavelengths are absorbed except those wavelengths that produce that color. • Ex. If you see a wall painted red, all wavelengths are being absorbed, except the red wavelength.

  4. Color Spectrum • The color spectrum is easily remembered with the acronym ROY-G-BIV from the longest to shortest waves (red-orange-yellow-green-blue-indigo-violet) • Red-Orange-Yellow-Green-Blue-Indigo-Violet (longest shortest)

  5. Wavelengths • There can be a broader wavelength than red, but we can’t see it • Ex. Radio waves. • There can be a thinner wavelength than violet. But we can’t see that either • Ex. Microwave or ultraviolet waves

  6. Two Theories of Color Vision • Trichromatic Theory: The human eye has three types of cones (red, green and blue) and thus all color perception must be due to mixing of these three colors. • Uses red, green and blue in staggered forms. This is how a TV works (red, green, blue projectors).

  7. Trichromatic TV Screen

  8. Color Vision • Trichromats- People with normal color vision who can discern all the colors of the visible spectrum- red, green, and blue-violet- as well as colors formed by various combinations of these hues. • Monochromats- People who only see in black and white • About 1 in every 40,000 people • Dichromats- People who lack one of the 3 types of cones, making it difficult to distinguish between certain types of colors. • People who are colorblind (red-green most common in men 8%; 1% in women)

  9. Two Theories of Color Vision • Opponent-Process Theory: Colors are paired and are antagonists (red vs. green, blue vs. yellow, white vs. black). • If a cone is responding to a red wavelength, it cannot respond to a green one at the same time.

  10. Opponent-Process

  11. Opponent-Process

  12. Lilac Chaser http://en.wikipedia.org/wiki/Lilac_chaser

  13. Color Personality Test http://www.eyetricks.com/illusions.htm http://www.viewzone.com/luscher2.html

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