lab colorspace – Plot xy coordinates in chromaticity diagram with python

import colour
import pandas as pd

df = pd.read_excel("C:/Users/User/Desktop/Color/Fontane/RGB/FontaneHucoxyy1.xlsx")

fig = colour.plotting.diagrams.plot_chromaticity_diagram(data_frame=df, x='R', y='G', Y='B')

fig.show()

I tried to plot the xyY data from an Excel file into my chromaticity diagram which you can find below, but this is not gonna work. My excel data is like enter image description here

The RGb represents xyY.

The chromaticity diagram looks like thisenter image description here

Does anyone know if this is possible and if possible how?

Thanks!

enter image description here