American access system ADV-1000 Guía de usuario descargar pdf (Pagina 539)

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A third common color model is CYMK (cyan,

magenta, yellow, and black), based on the use of four

colors of ink to approximate a full spectrum of

colors. Many badge printers use the CMYK color

model and, therefore, will give only an approximate

match for the colors displayed on the screen.

Hue, Saturation and Luminosity

The HSL color model is based on how colors are

viewed by the human eye. Colors are described by

three basic characteristics.

• Hue is the wave length of light reflected by [or

transmitted through] an object. It is the charac-

teristic commonly called color, and identified by

color names such as yellow, green, or orange.

Hue values range from 0 [red] through 239

[running through the spectrum and returning to

red].

• Saturation is the strength of the color. It indi-

cates the amount of gray in the color. Saturation

values range from 0 [gray with no trace of color]

through 240 [fully saturated color with no gray].

• Luminosity is the relative brightness or darkness

of the color. Luminosity values range from 0

[black] through 240 [white] with the untinted

color at about 120.

Red Green Blue

The RGB model is based on the representation of

the visible spectrum by mixing red, green, and blue

light. Computer monitors are based on this model,

creating colors by emitting light through red, green,

and blue phosphors.

The RGB model assigns a value for each pixel

ranging from 0 [black] to 255 [white] for each color

component. For example, the red on the Basic color

palette has a Red value of 255, a Green value of 0

and a Blue value of 6.

Badging

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