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# Deprecated symbols

Review symbols that are no longer in active development, and their recommended replacements.

## Overview

Although these symbols are available for use, Apple is no longer actively developing them, and may remove them in a future release. Apple recommends moving away from these symbols and using their indicated replacements instead. Check the individual symbol pages for the recommended replacements.

## Topics

### Deprecated constants

[`static const NSColorSpaceModel NSUnknownColorSpaceModel;`](/documentation/AppKit/NSUnknownColorSpaceModel)

An unknown color-space model.

[`static const NSColorSpaceModel NSGrayColorSpaceModel;`](/documentation/AppKit/NSGrayColorSpaceModel)

The grayscale color-space model.

[`static const NSColorSpaceModel NSRGBColorSpaceModel;`](/documentation/AppKit/NSRGBColorSpaceModel)

The RGB (red green blue) color-space model.

[`static const NSColorSpaceModel NSCMYKColorSpaceModel;`](/documentation/AppKit/NSCMYKColorSpaceModel)

The CYMK (cyan, yellow, magenta, black) color-space model.

[`static const NSColorSpaceModel NSLABColorSpaceModel;`](/documentation/AppKit/NSLABColorSpaceModel)

The L*a*b* device-independent color-space model, which represents colors relative to a reference white point.

[`static const NSColorSpaceModel NSDeviceNColorSpaceModel;`](/documentation/AppKit/NSDeviceNColorSpaceModel)

DeviceN is a color-space model from Adobe Systems, Inc. used in PostScript and PDF color specification.

[`static const NSColorSpaceModel NSIndexedColorSpaceModel;`](/documentation/AppKit/NSIndexedColorSpaceModel)

An indexed color space, which identifies specified discrete colors in a color list by index number. An indexed color value (a color specification in indexed color space) consists of an index value that refers to a color in a color list.

[`static const NSColorSpaceModel NSPatternColorSpaceModel;`](/documentation/AppKit/NSPatternColorSpaceModel)

Identifies a pattern color space, which is simply an image that is repeated over and over again in a tiled pattern.


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