---
title: cmGrayASpace
framework: Application Services
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.0+]
path: applicationservices/1560701-abstract_color_space_constants/cmgrayaspace
---

# cmGrayASpace

A luminance color space with two components, a gray component followed by an alpha channel component. Each component value is 16 bits.

## Declaration

```occ
cmGrayASpace = cmGraySpace + cmAlphaSpace
```