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You can define colors in several different color models, most commonly RGB, CMYK, and 
the spot color matching system (such as PANTONE). Depending on the application you use, 
you may or may not have a choice of the color model. 

 colors are used when you take output from an RGB device such as a digital camera or a 

scanner. Another use of the RGB color model is for displaying colors on a monitor.

 colors are what most printers use.

, such as PANTONE, are special inks manufactured to run on an offset printing 

press. Spot colors can be simulated using CMYK toners (also known as 

 inks). 

With the Spot Color Matching print option, you can determine how spot colors are printed 
at the Color Server:

•

 uses color tables built in the Color Server to simulate the spot 

color with the closest equivalent available using the CMYK toners of the copier/printer 
connected to the Color Server. 

•

 instructs the Color Server to simulate the spot color using CMYK 

equivalents defined by the spot color manufacturer. These are the same CMYK values used 
by applications that include spot color libraries. This CMYK combination is then printed 
with the CMYK Simulation setting you choose, such as 

 or 

The color model used by your application determines the methods available for choosing 
colors, as well as the way color data is transmitted to the Color Server:

• Office applications, such as presentation software, spreadsheets, and word processing 

programs, use the RGB color model. They typically transmit only RGB data to the 
Color Server.

• Illustration applications use both the RGB and CMYK color models, but typically 

transmit only CMYK data to the Color Server.

• Pixel-editing applications use both the RGB and CMYK color models. They can transmit 

either RGB or CMYK data to the Color Server.

You can use the Color Server for on-demand color printing and for color proofing. 
On-demand color printing refers to those jobs for which the Color Server is the final print 
device. Printing jobs to the Color Server in preparation for printing on an offset press is 
referred to as color proofing. Both types of Color Server print jobs can use RGB, CMYK, and 
spot colors.

The term “on-demand” applies to producing printed output when it is needed. You 

may be familiar with the term “short-run”, which usually applies to the volume of a printing 
task. Although these terms do not mean exactly the same thing, “on-demand” in this manual 
applies also to short-run printing scenarios. Because you can print as many pages as you need 
and can reprint jobs quickly, the Color Server performs equally well in either environment.

The type of printing you plan for the document, on-demand color printing on the 
Color Server versus color proofing for eventual printing on an offset press, determines the way 
you define colors, as well as the print option settings you choose.

• For on-demand color printing on the Color Server, use any application and define colors 

in either RGB or CMYK. If your application supports it, you can also choose colors from 
the PANTONE color library. Choose the appropriate settings for print options affecting 
color output (for descriptions of the print options, see 

• For color proofing, use a PostScript-defined color in CMYK or choose colors from color 

libraries, such as the PANTONE color library. Placed images can also be defined in RGB 
or CMYK. Choose the appropriate settings for print options affecting color output (see 

).

The Color Server allows you to use RGB or CMYK data when printing proofs for 

an offset press run. However, sending data to an 

 usually requires CMYK data.

Bright, saturated colors are often desirable. 

Require the printed colors to match 
those from another set of CMYK 
printing conditions. 

Colors are achieved using the full range 
of colors available, referred to as the full 

 of the printer or, more simply, device 

CMYK. 

Colors that are specified for an offset press 
require CMYK simulation that is optimized 
for proofing on the printer.

For the colors you see on your monitor to match those on your printed output, they must go 
through color management, including precise 

 of your monitor and Color Server. 

If viewing colors on the monitor is critical, consider using a professional profiling software 
package and instrument, such as the EFI Color Profiler, to create a monitor profile. A monitor 
profile enables the application to compensate for the color behavior of the monitor when 
displaying images. As a result, colors previewed on the monitor match the colors more closely 
in your printed output. 

If you are not equipped or inclined to maintain accurate monitor color management, you can 
opt for an easier approach. Determine which is more important to you: printed colors or 
on-screen colors.

• If displayed colors are more important, trust your eyes and your monitor. Visually select 

colors on your monitor, but be aware that colors are optimized only for your monitor. 
When the document is opened on other monitors, the colors may look different. And even 
though printed colors may not match those on your monitor, they still print to the 
Color Server with good results.

• If printed colors are your priority, choose colors from printed samples. By using sample 

colors, you ensure your printed output remains consistent, regardless of how the 
colors appear on different monitors. Print the palette of available colors from business 
applications and select colors from the printed samples. Color reference files are included 
on the User Software CD. (For more information, see

 on page 25.) You can also print color charts from the Color Server and select 

colors by name or number from the printed samples. Advanced applications allow you to 
define colors in the easier-to-control spot and CMYK color spaces. For more information 
about color selection, see 

The ColorWise color management system provides complete color management for jobs 
printed from office applications and other applications that do not generate PostScript. This 
chapter provides instructions for printing color documents from 

 applications, such as presentation, spreadsheet, and word processing 

applications. Use these instructions with the Microsoft Office applications.

The Color Server must receive PostScript instructions to print an image or a document. Many 
applications do not create these PostScript instructions, relying on the printer driver to create 
them. Included in this category are most word processing, spreadsheet, and 

 applications. These applications use Windows 

 to display and print when 

running Windows, and Apple 

 to display and print when running Mac OS. 

” is used in this manual to refer to these GDI and QuickDraw 

applications.

All office applications handle color similarly, using the same RGB color model used for the 
color monitor. Most office applications allow you to choose colors from a palette of 
preselected colors. Some allow you to add new colors to the palette using a color picker. 
Although some applications allow you to specify color using the CMY, HSL, and HSV color 
models, these applications always send RGB color data to the Color Server. 
(An exception to this is a CMYK EPS file placed in the document, which is sent as 
CMYK data.)

When working with color in office applications, consider the following:

• The range of colors that can be displayed in RGB on your monitor is much larger than the 

range of colors that can be printed on your printer. When you print the document, 
out-of-gamut RGB colors are mapped to the colors your printer can produce.

• Office applications send only RGB data to the Color Server. You control the rendering 

style of the color conversion with your selection of a 

.

Each CRD uses a different color rendering style and has a different way of mapping 
unprintable colors to the color gamut of your printer. For more information about color 
rendering styles, see 

.