new_option.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
  "description": "The total number of votes each candidate got in the 2016 presidential primary.",
  "width": 600,
  "height": 600,
  "padding": 5,
  "autosize": "none",
  "data": {
    "values": [
      {"color": "red", "Candidate": "Ben Carson", "Total Votes": 564553},  
      {"color": "red", "Candidate": "Carly Fiorina", "Total Votes": 15191},
      {"color": "red", "Candidate": "Chris Christie", "Total Votes": 24353}, 
      {"color": "red", "Candidate": "Donald Trump", "Total Votes": 13302541}, 
      {"color": "red", "Candidate": "Jeb Bush", "Total Votes": 94411}, 
      {"color": "red", "Candidate": "John Kasich", "Total Votes": 4159949}, 
      {"color": "red", "Candidate": "Marco Rubio", "Total Votes": 3321076},
      {"color": "red", "Candidate": "Ted Cruz", "Total Votes": 7603006},
      {"color": "red", "Candidate": "Mike Huckabee", "Total Votes": 3345},
      {"color": "red", "Candidate": "Rand Paul", "Total Votes": 8497},

      {"color": "blue", "Candidate": "Hillary Clinton", "Total Votes": 15692452},
      {"color": "blue", "Candidate": "Bernie Sanders", "Total Votes": 11959102},
      {"color": "blue", "Candidate": "O'Malley", "Total Votes": 752}
    ]
  },
  "transform": [
    {"calculate" : "toString('black')", "as": "color2"}
  ],
  "encoding": {
    "y": {
      "field": "Candidate",
      "type": "ordinal"
    },
    "x": {
      "field": "Total Votes",
      "type": "quantitative"
    },
    "color": {
     "field": "color",
     "type": "nominal",
     "scale": null
    }
  },
  "layer": [
    {
      "mark": "bar"
    },
    {
      "mark": {
        "type": "text",
        "align": "left",
        "baseline": "middle",
        "dx": 7
      },
      "encoding": {
        "text": {
          "field": "Total Votes",
          "type": "quantitative"
        },
        "color": {
          "field" : "color2",
          "type": "ordinal",
          "scale": null
        }
      }
    }
  ]
}