@scipioAfrianus asked if you can get rid of the glow / drop shadow.

You can.

fig.update_layout(
    title_text="Basic Sankey Diagram",
    font_family="Courier New",
    font_color="blue",
    font_size=12,
    title_font_family="Times New Roman",
    title_font_color="red",

    font_shadow="None",
)