[Python] Plotly express bar chart colour change

How can I change the colour of the plotly express bar-chart to green in the following code?

import plotly.express as px
import pandas as pd

# prepare the dataframe
df = pd.DataFrame(dict(
x=[1, 2, 3],
y=[1, 3, 2]
))


# prepare the layout
title = "A Bar Chart from Plotly Express"

fig = px.bar(df,
x='x', y='y', # data from df columns
color= pd.Series('green', index=range(len(df))), # does not work
title=title,
labels={'x': 'Some X', 'y':'Some Y'})
fig.show()

Continue reading...