---
title: kColorSyncSigGrayData
framework: colorsync
role: symbol
role_heading: Global Variable
platforms: [iOS 16.0+, iPadOS 16.0+, Mac Catalyst 13.0+, macOS 10.13+, tvOS 16.0+, visionOS 1.0+, watchOS 9.0+]
path: colorsync/kcolorsyncsiggraydata
---

# kColorSyncSigGrayData

The signature identifying the grayscale data color space.

## Declaration

```swift
var kColorSyncSigGrayData: Unmanaged<CFString>!
```

## See Also

### Identifying color spaces

- [kColorSyncSigCmykData](colorsync/kcolorsyncsigcmykdata.md)
- [kColorSyncSigLabData](colorsync/kcolorsyncsiglabdata.md)
- [kColorSyncSigRgbData](colorsync/kcolorsyncsigrgbdata.md)
- [kColorSyncSigXYZData](colorsync/kcolorsyncsigxyzdata.md)