Color Test

spec.json

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "width": 400,
  "height": 300,
  "style": "cell",
  "data": [
    {
      "name": "data-9794decafd64313e2c537fe6fc95bda8",
      "values": [
        {"x": 2, "y": 2, "label": "B"},
        {"x": 1, "y": 3, "label": "A"},
        {"x": 3, "y": 2, "label": "C"},
        {"x": 0.4, "y": 2, "label": "D"},
        {"x": 0.4, "y": 2.5, "label": "E"}
      ]
    },
    {
      "name": "data_0",
      "source": "data-9794decafd64313e2c537fe6fc95bda8",
      "transform": [
        {
          "type": "filter",
          "expr": "isValid(datum[\"x\"]) && isFinite(+datum[\"x\"]) && isValid(datum[\"y\"]) && isFinite(+datum[\"y\"])"
        }
      ]
    },
    {
      "name": "mapping",
      "values": [
        {"domain": "A", "range": "#4daf4a"},
        {"domain": "B", "range": "#984ea3"},
        {"domain": "C", "range": "#ff7f00"},
        {"domain": "G", "range": "#ffffff"}
      ]
    },
    {
      "name": "mapping_filtered",
      "source": "data-9794decafd64313e2c537fe6fc95bda8",
      "transform": [
        {
          "type": "aggregate",
          "groupby": [
            {"field": "label", "as": "domain"},
            {"field": "x", "as": "x"},
            {"field": "y", "as": "y"}
          ]
        },
        {
          "type": "lookup",
          "from": "mapping",
          "key": "domain",
          "fields": ["domain"],
          "values": ["range"],
          "default": "#a9a9a9"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "symbol",
      "style": ["point"],
      "from": {"data": "mapping_filtered"},
      "encode": {
        "update": {
          "opacity": {"value": 0.7},
          "fill": {"value": "transparent"},
          "stroke": {"field": "range"},
          "x": {"scale": "x", "field": "x"},
          "y": {"scale": "y", "field": "y"},
          "shape": {"scale": "shape", "field": "label"}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "linear",
      "domain": {"data": "data_0", "field": "x"},
      "range": [0, {"signal": "width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "y"},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": {"data": "mapping_filtered", "field": "domain"},
      "range": {"data": "mapping_filtered", "field": "range"}
    },
    {
      "name": "shape",
      "type": "ordinal",
      "domain": {"data": "data_0", "field": "label", "sort": true},
      "range": "symbol"
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "domain": false,
      "labels": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "gridScale": "x",
      "grid": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "domain": false,
      "labels": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "x",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "y",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ],
  "legends": [
    {
      "stroke": "color",
      "symbolType": "circle",
      "title": "label",
      "encode": {
        "symbols": {
          "update": {
            "fill": {"value": "transparent"},
            "opacity": {"value": 0.7}
          }
        }
      }
    },
    {
      "shape": "shape",
      "symbolType": "circle",
      "title": "label",
      "encode": {
        "symbols": {
          "update": {
            "fill": {"value": "transparent"},
            "opacity": {"value": 0.7}
          }
        }
      }
    }
  ]
}