For screening of any film, DCP uses XYZ Color space format which is visible to your naked eyes in RGB Color Space. XYZ Color Space format is used extensively in DCP as it is found to be well-suited for viewing by human eyes.
Also, the scope of XYZ format is much larger and extensive as compared to RGB. It identifies and applies colors beyond the RGB spectrum too. For DCP Cinema screening, colors are converted to XYZ space from RGB. During the process of DCP creation, grading is done using Rec709 color standard.
DCP Video settings required are:
Gamma offset 2.2 in Rec709 and sRGB color profiles
Color Temperature set at 6500K (Kelvin)
Bit Depth kept at 12-bit color (4096 colors per channel = trillions of colors) or 32-bit Floating Value
