Style A and B Axis

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

Section

aaxis.minorgridcolor:, gridcolor:, and color: style the parametric axis lines and labels. layout.plot_bgcolor: and paper_bgcolor: set the chart background — here a dark theme.

alias Plotly.{Figure, Carpet}

Figure.new()
|> Figure.add_trace(
  Carpet.new(
    a: [4, 4, 4, 4.5, 4.5, 4.5, 5, 5, 5, 6, 6, 6],
    b: [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3],
    y: [2, 3.5, 4, 3, 4.5, 5, 5.5, 6.5, 7.5, 8, 8.5, 10],
    aaxis: %{
      tickprefix: "a = ",
      ticksuffix: "m",
      smoothing: 1,
      minorgridcount: 9,
      minorgridcolor: "white",
      gridcolor: "white",
      color: "white"
    },
    baxis: %{
      tickprefix: "b = ",
      ticksuffix: "Pa",
      smoothing: 1,
      minorgridcount: 9,
      minorgridcolor: "white",
      gridcolor: "white",
      color: "white"
    }
  )
)
|> Figure.update_layout(
  title: "Carpet Plot — Styled Axes (Dark Theme)",
  plot_bgcolor: "black",
  paper_bgcolor: "black"
)
|> Plotly.show()