kCGImagePropertyColorModel
The color model of the image, such as RGB, CMYK, grayscale, or Lab.
Declaration
let kCGImagePropertyColorModel: CFStringDiscussion
The value of this key is of type CFString. Typically, the value corresponds to the kCGImagePropertyColorModelRGB, kCGImagePropertyColorModelCMYK, kCGImagePropertyColorModelGray, or kCGImagePropertyColorModelLab constant.
A color model describes how color values are represented mathematically. A color space is a color model combined with a definition of how to interpret values within the model.