text: """
  CIE RGB Colourspace
  ===================
  
  Defines the *CIE RGB* colourspace:
  
  -   :attr:`colour.models.RGB_COLOURSPACE_CIE_RGB`.
  
  References
  ----------
  -   :cite:`Fairman1997` : Fairman, H. S., Brill, M. H., & Hemmendinger, H.
      (1997). How the CIE 1931 color-matching functions were derived from
      Wright-Guild data. Color Research & Application, 22(1), 11-23.
      doi:10.1002/(SICI)1520-6378(199702)22:1<11::AID-COL4>3.0.CO;2-7
  """
  
  from __future__ import annotations
  
  import numpy as np
  from functools import partial
  
  from colour.colorimetry import CCS_ILLUMINANTS
  from colour.hints import NDArray
  from colour.models.rgb import RGB_Colourspace, gamma_function
  
  __author__ = "Colour Developers"
  __copyright__ = "Copyright (C) 2013-2022 - Colour Developers"
  __license__ = "New BSD License - https://opensource.org/licenses/BSD-3-Clause"
  __maintainer__ = "Colour Developers"
  __email__ = "colour-developers@colour-science.org"
  __status__ = "Production"
  
  __all__ = [
      "PRIMARIES_CIE_RGB",
      "WHITEPOINT_NAME_CIE_RGB",
      "CCS_WHITEPOINT_CIE_RGB",
      "MATRIX_CIE_RGB_TO_XYZ",
      "MATRIX_XYZ_TO_CIE_RGB",
      "RGB_COLOURSPACE_CIE_RGB",
  ]
  
  PRIMARIES_CIE_RGB: NDArray = np.array(
      [
          [0.734742840005998, 0.265257159994002],
          [0.273779033824958, 0.717477700256116],
          [0.166555629580280, 0.008910726182545],
      ]
  )
  """
  *CIE RGB* colourspace primaries.
  
  Notes
  -----
  -   *CIE RGB* colourspace primaries were computed using
      :attr:`colour.models.rgb.datasets.cie_rgb.MATRIX_CIE_RGB_TO_XYZ` attribute
      and :func:`colour.primaries_whitepoint` definition.
  """
  
  WHITEPOINT_NAME_CIE_RGB: str = "E"
  """
  *CIE RGB* colourspace whitepoint name.
  """
  
  CCS_WHITEPOINT_CIE_RGB: NDArray = CCS_ILLUMINANTS[
      "CIE 1931 2 Degree Standard Observer"
  ][WHITEPOINT_NAME_CIE_RGB]
  """
  *CIE RGB* colourspace whitepoint chromaticity coordinates.
  """
  
  MATRIX_CIE_RGB_TO_XYZ: NDArray = np.array(
      [
          [0.4900, 0.3100, 0.2000],
          [0.1769, 0.8124, 0.0107],
          [0.0000, 0.0099, 0.9901],
      ]
  )
  """
  *CIE RGB* colourspace to *CIE XYZ* tristimulus values matrix.
  """
  
  MATRIX_XYZ_TO_CIE_RGB: NDArray = np.linalg.inv(MATRIX_CIE_RGB_TO_XYZ)
  """
  *CIE XYZ* tristimulus values to *CIE RGB* colourspace matrix.
  """
  
  RGB_COLOURSPACE_CIE_RGB: RGB_Colourspace = RGB_Colourspace(
      "CIE RGB",
      PRIMARIES_CIE_RGB,
      CCS_WHITEPOINT_CIE_RGB,
      WHITEPOINT_NAME_CIE_RGB,
      MATRIX_CIE_RGB_TO_XYZ,
      MATRIX_XYZ_TO_CIE_RGB,
      partial(gamma_function, exponent=1 / 2.2),
      partial(gamma_function, exponent=2.2),
  )
  RGB_COLOURSPACE_CIE_RGB.__doc__ = """
  *CIE RGB* colourspace.
  
  References
  ----------
  :cite:`Fairman1997`
  """
  