Additive and subtractive color mixtures
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Additive and Subtractive Color Mixtures - PowerPoint PPT Presentation

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Additive and subtractive color mixtures
Additive and Subtractive Color Mixtures

Most objects we see consist of more than one color. Their colors are mixtures of wavelengths of light. Two kinds of color mixtures: additive and subtractive. Additive color mixture refers to mixing the three primary lights: red, blue, and green. When all three colors of light are added, we see white light.Subtractive color mixtures are colors that result from mixing pigments, paint, or dye. Certain wavelengths are removed (i.e., subtractive) when colors are mixed in this way. Primary colors for subtractive mixtures are magenta, yellow, and cyan.

More color after effects
More color after-effects


An example of figure ground ambiguity
An Example of Figure-Ground Ambiguity

Necker cube illusion
Necker cube illusion



Additive and subtractive color mixtures

  • In the appear equal – which they areMüller-Lyer illusion, two vertical line segments are equal in length, but the one with arrow feather endings appears to be longer

    • Line with arrow feather endings has the appearance of a corner that is receding away from you (corners where two walls meet in a room), while the line with arrowhead endings has the appearance of a corner that is jutting out toward you (corners where two sides of a building meet)

    • Thus, it is our past experience with corners that leads the brain to believe that the line with arrow feather endings is farther away