Adobe Illustrator CS4 - Manual (Page 156)

149 USING ADOBE ILLUSTRATOR CS4
Color management
A working space profile acts as the source profile for newly created documents that use the associated color model. For
example, if Adobe RGB (1998) is the current RGB working space profile, each new RGB document that you create will
use colors within the Adobe RGB (1998) gamut. Working spaces also determine the appearance of colors in untagged
documents.
If you open a document embedded with a color profile that doesn’t match the working space profile, the application
uses a color management policy to determine how to handle the color data. In most cases, the default policy is to
preserve the embedded profile.
See also
“ About missing and mismatched color profiles ” on page 150
“ Color management policy options ” on page 150
Working space options
To display working space options in Photoshop, Illustrator and InDesign, choose Edit > Color Settings. In Acrobat,
select the Color Management category of the Preferences dialog box.
To view a description of any profile, select the profile and then position the pointer over the profile name. The
description appears at the bottom of the dialog box.
RGB Determines the RGB color space of the application. In general, it’s best to choose Adobe RGB or sRGB, rather
than the profile for a specific device (such as a monitor profile).
sRGB is recommended when you prepare images for the web, because it defines the color space of the standard
monitor used to view images on the web. sRGB is also a good choice when you work with images from consumer-level
digital cameras, because most of these cameras use sRGB as their default color space.
Adobe RGB is recommended when you prepare documents for print, because Adobe RGB’s gamut includes some
printable colors (cyans and blues in particular) that can’t be defined using sRGB. Adobe RGB is also a good choice
when working with images from professional-level digital cameras, because most of these cameras use Adobe RGB as
their default color space.
CMYK Determines the CMYK color space of the application. All CMYK working spaces are device-dependent,
meaning that they are based on actual ink and paper combinations. The CMYK working spaces Adobe supplies are
based on standard commercial print conditions.
Gray (Photoshop) or Grayscale (Acrobat) Determines the grayscale color space of the application.
Spot (Photoshop) Specifies the dot gain to use when displaying spot color channels and duotones.
Note: In Acrobat, you can use the color space in an embedded output intent instead of a document color space for viewing
and printing. For more information on output intents, see Acrobat Help.
Adobe applications ship with a standard set of working space profiles that have been recommended and tested by
Adobe Systems for most color management workflows. By default, only these profiles appear in the working space
menus. To display additional color profiles that you have installed on your system, select Advanced Mode (Illustrator
and InDesign) or More Options (Photoshop). A color profile must be bi-directional (that is, contain specifications for
translating both into and out of color spaces) in order to appear in the working space menus.
Note: In Photoshop, you can create custom working space profiles. However, Adobe recommends that you use a standard
working space profile rather than create a custom profile. For more information, see the Photoshop support
knowledgebase at www.adobe.com/support/products/photoshop.html.