ImageGear for C and C++ on Windows v19.10 - Updated
enumIGPDFColorSpace
API Reference Guide > PDF Component API Reference > PDF Component Enumerations Reference > enumIGPDFColorSpace

Specifies the color space in which a color value is specified (for example, RGB or Grayscale).

Values:

IG_PDF_DEVICE_GRAY Grayscale color specification. Requires 1 value entry to specify the color.
IG_PDF_DEVICE_RGB Red-Green-Blue color specification. Requires 3 value entries to specify the color.
IG_PDF_DEVICE_CMYK Cyan-Magenta-Yellow-Black color specification. Requires 4 value entries to specify the color.