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# Image Buffer Color Primaries Constants

Constants that indicate the color primaries gamut for the image buffer.

## Discussion

Use the [`kCVImageBufferColorPrimariesKey`](/documentation/CoreVideo/kCVImageBufferColorPrimariesKey) key to attach one of these values to the image buffer. The color primaries gamut describes the rendering intent of an image, for use in color matching operations, along with a transfer function (See [Image Buffer Transfer Function Constants](/documentation/CoreVideo/image-buffer-transfer-function-constants) for more information.).

## Topics

### Constants

[`let kCVImageBufferColorPrimaries_ITU_R_709_2: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_ITU_R_709_2)

A key to the color primaries gamut for HD video.

[`let kCVImageBufferColorPrimaries_EBU_3213: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_EBU_3213)

A key to the color primaries gamut for PAL video.

[`let kCVImageBufferColorPrimaries_SMPTE_C: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_SMPTE_C)

A key to the color primaries gamut for standard-definition video.

[`let kCVImageBufferColorPrimaries_DCI_P3: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_DCI_P3)

[`let kCVImageBufferColorPrimaries_ITU_R_2020: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_ITU_R_2020)

[`let kCVImageBufferColorPrimaries_P3_D65: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_P3_D65)

[`let kCVImageBufferColorPrimaries_P22: CFString`](/documentation/CoreVideo/kCVImageBufferColorPrimaries_P22)

A key to the color primaries gamut for sRGB video.


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