Lexmark CS827 User Manual page 114

Troubleshooting
Object type
RGB Image
RGB Text
RGB Graphics
CMYK Image
CMYK Text
CMYK Graphics
FAQ about color printing
What is RGB color?
RGB color is a method of describing colors by indicating the amount of red, green, or blue used to produce
a certain color. Red, green, and blue light can be added in various amounts to produce a large range of colors
observed in nature. Computer screens, scanners, and digital cameras use this method to display colors.
What is CMYK color?
CMYK color is a method of describing colors by indicating the amount of cyan, magenta, yellow, and black
used to reproduce a particular color. Cyan, magenta, yellow, and black inks or toners can be printed in various
amounts to produce a large range of colors observed in nature. Printing presses, inkjet printers, and color
laser printers create colors in this manner.
How is color specified in a document to be printed?
Software programs are used to specify and modify the document color using RGB or CMYK color
combinations. For more information, see the software program Help topics.
How does the printer know what color to print?
When printing a document, information describing the type and color of each object is sent to the printer and
is passed through color conversion tables. Color is translated into the appropriate amounts of cyan, magenta,
yellow, and black toner used to produce the color you want. The object information determines the application
of color conversion tables. For example, it is possible to apply one type of color conversion table to text while
applying a different color conversion table to photographic images.
Color conversion tables
•
Vivid—Produces brighter, more saturated colors and may be
applied to all incoming color formats.
•
sRGB Display—Produces an output that approximates the colors
displayed on a computer monitor. Black toner usage is optimized
for printing photographs.
•
Display‑True Black—Produces an output that approximates the
colors displayed on a computer monitor. This setting uses only
black toner to create all levels of neutral gray.
•
sRGB Vivid—Provides an increased color saturation for the sRGB
Display color correction. Black toner usage is optimized for
printing business graphics.
•
Off
•
US CMYK—Applies color correction to approximate the
Specifications for Web Offset Publishing (SWOP) color output.
•
Euro CMYK—Applies color correction to approximate Euroscale
color output.
•
Vivid CMYK—Increases the color saturation of the US CMYK color
correction setting.
•
Off
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