{
  "colorings": [
    {
      "key": "location",
      "title": "Location",
      "type": "categorical",
      "legend": [
          {"value": "alpha", "display": "α"},
          {"value": "beta"}
      ],
      "scale": [
          ["beta", "#bd0026"],
          ["gamma", "#6a51a3"]
      ]
    },
    {
      "key": "mutation_length",
      "title": "Mutations per branch",
      "type": "continuous",
      "legend": [
          {"value": 1, "display": "0-2", "bounds": [-1,2]},
          {"value": 3, "display": "3-5", "bounds": [2,5]},
          {"value": 5, "display": ">5", "bounds": [5, 10]}
      ],
      "scale": [
          [1, "#081d58"],
          [3, "#1d91c0"],
          [5, "#c7e9b4"]
      ]
    },
    {
      "key": "zero_value",
      "title": "Zero",
      "type": "ordinal"
    }
  ],
  "filters": [
    "location",
    "zero_value"
  ]
}
