Munsell Colour to sRGB

munsell_to_srgb.py

import numpy as np
import colour

xyY = np.asarray(colour.MUNSELL_COLOURS_REAL[2000][1])

# Munsell Renotation System uses C illuminant. 
# Luminance is in range [0-100], so we need to scale it
# back to [0-1].
XYZ = colour.xyY_to_XYZ(xyY)
RGB = colour.XYZ_to_sRGB(
    XYZ / 100, colour.ILLUMINANTS.get(
    'CIE 1931 2 Degree Standard Observer').get('C'),
    apply_OECF=False)

# Not all the Munsell colours can be encoded by 
# sRGB colourspace, You would have to clip that 
# particular one in order to display it.
print(RGB)
# [ 0.97132396  0.31934229 -0.03864044]

# Those values are linear light values, so in
# order to display the colour accurately,
# you would need to apply the sRGB OECF.
# You can do that in the above definition call
# or later as your convenience by doing something
# along those lines:
print(colour.sRGB_COLOURSPACE.OECF(RGB))
# [ 0.98728743  0.60068106 -0.49923444]