{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Using the field \"c\" as the color scale's range. Note that this only works if there is a 1:1 mapping between the color domain field (`l`) and the range field (`c`).",
  "background": "white",
  "padding": 5,
  "width": 20,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"y": "X", "l": "A", "c": "red"},
        {"y": "Y", "l": "B", "c": "blue"},
        {"y": "Z", "l": "C", "c": "green"}
      ]
    }
  ],
  "signals": [
    {"name": "y_step", "value": 20},
    {
      "name": "height",
      "update": "bandspace(domain('y').length, 1, 0.5) * y_step"
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "symbol",
      "style": ["circle"],
      "from": {"data": "source_0"},
      "encode": {
        "update": {
          "opacity": {"value": 0.7},
          "fill": {"scale": "color", "field": "l"},
          "ariaRoleDescription": {"value": "circle"},
          "description": {
            "signal": "\"y: \" + (isValid(datum[\"y\"]) ? datum[\"y\"] : \"\"+datum[\"y\"]) + \"; l: \" + (isValid(datum[\"l\"]) ? datum[\"l\"] : \"\"+datum[\"l\"])"
          },
          "x": {"signal": "width", "mult": 0.5},
          "y": {"scale": "y", "field": "y"},
          "shape": {"value": "circle"}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "y",
      "type": "point",
      "domain": {"data": "source_0", "field": "y", "sort": true},
      "range": {"step": {"signal": "y_step"}},
      "padding": 0.5
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "source_0", "field": "l", "sort": true},
      "range": {
        "data": "source_0",
        "field": "c",
        "sort": {"op": "min", "field": "l"}
      }
    }
  ],
  "axes": [
    {"scale": "y", "orient": "left", "grid": false, "title": "y", "zindex": 0}
  ],
  "legends": [
    {
      "fill": "color",
      "symbolType": "circle",
      "title": "l",
      "encode": {"symbols": {"update": {"opacity": {"value": 0.7}}}}
    }
  ]
}