Style Sankey Diagram

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

Combine all node and link styling into a fully styled diagram. layout.paper_bgcolor and layout.plot_bgcolor set the background.

alias Plotly.{Figure, Sankey}

Figure.new()
|> Figure.add_trace(
  Sankey.new(
    valueformat: ".0f",
    valuesuffix: " TWh",
    node: %{
      label: ["Coal", "Natural Gas", "Oil", "Electricity", "Losses"],
      color: ["black", "steelblue", "saddlebrown", "goldenrod", "dimgray"],
      pad: 20,
      thickness: 25,
      line: %{color: "white", width: 1}
    },
    link: %{
      source: [0, 1, 2, 0, 1],
      target: [3, 3, 3, 4, 4],
      value:  [25, 20, 30, 10, 15],
      color: [
        "rgba(0,0,0,0.35)",
        "rgba(70,130,180,0.35)",
        "rgba(139,69,19,0.35)",
        "rgba(0,0,0,0.2)",
        "rgba(70,130,180,0.2)"
      ]
    }
  )
)
|> Figure.update_layout(
  title: "Styled Sankey Diagram",
  width: 800,
  height: 500,
  font: %{size: 12, color: "white"},
  paper_bgcolor: "#1a1a2e",
  plot_bgcolor: "#1a1a2e"
)
|> Plotly.show()