Vega Highlight

vega.json

{
    "description": "Violations by reporting source",
    "data": { "url": "/data/case_by_case_source.csv"},
    "transform": {
        "calculate": [{"field": "highlight", "expr": "datum.case_source == \"Citizen Complaint\" ? \"true\" : \"false\""}]
    },
    "mark": "bar",
    "encoding": {
        "y": {"field": "case_source", "type": "ordinal", "sort": {"op": "sum", "field": "cases"}, "axis": {"title": "Case Source"}},
        "x": {"field": "cases", "type": "quantitative", "axis": {"title": "# Cases"}},
        "color": {
          "field": "highlight", "type": "nominal",
          "scale": {"range": ["#eeeeee","#659CCA"]},
          "legend": false
        }
    }
}