Oki C 9400 User Manual download pdf (Page 340)

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perception of everything around us.

White Light

White light contains light from all visible wavelengths in balanced quantities.

Black Light

Black light is the absence of all wavelengths.

Perceived Light

Different individual wavelengths in the spectrum give rise to what we perceive as color. For

example, a wavelength around 700 nm (0.0007 mm wavelength) in interpreted by our eyes as

red, while the other end of the scale, 400 nm, is interpreted by our eyes as violet.

Neutral Colors

Although the term color is used, neutral colors do not have properties of hue or saturation. They

are described in terms of lightness only.

The neutral colors are black and white and all shades of gray in between. A balanced mix of the

subtractive primariescyan, magenta and yellowyields the neutral color or black (in theory). The

same effect can be achieved with the additive primaries by having an equal mix of red, green

and blue light.

Primary & Secondary Colors

In theory, all colors can be made up from a very small group of color elements.

Primary Colors

There are three primary colors: blue, red and yellow. All other colors can be obtained by mixing

the primary colors in varying proportions.

Secondary Colors

Mixing two primary colors in equal proportions produces what is known as a secondary color.

For example, mixing blue and yellow produces the secondary color green.

Problems Using Color

Computer monitors and printers use different methods to generate colors. Computer monitors

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