CODE EXAMPLE FOR PYTHON

plotly graph object colorscale

import plotly.graph_objects as go

fig = go.Figure()

# Create list from 0 to 39 to use as x, y, and color
values = list(range(40))

fig.add_trace(go.Scatter(
    x=values,
    y=values,
    marker=dict(
        size=16,
        cmax=39,
        cmin=0,
        color=values,
        colorbar=dict(
            title="Colorbar"
        ),
        colorscale="Viridis"
    ),
    mode="markers"))

fig.show()