Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Inside Macintosh: Advanced Color Imaging Reference /: Chapter 3 - ColorSync Manager Reference for Applications and Device Drivers / Constants and Data Types

Gray Color Value
A color value expressed in the Gray color space is composed of a single component, gray, represented as a numeric value within the range of 0 to 65535 inclusive.
struct CMGrayColor {
   unsigned shortgray;           
};