Echarts change bar color based on value

Trying to build a bar chart in Business Charts. I want this chart to be one color if below RUN and another when above. Below is my code

let AVG_RATE_PER_HOUR = [];
let FullName = [];
let RUN;
let RUN_PLUS;

context.panel.data.series.map((s) => {
  if (s.refId === "AVG_RATE") {
    AVG_RATE_PER_HOUR = s.fields.find((f) => f.name === 'AVG_RATE_PER_HOUR').values;
    FullName = s.fields.find((f) => f.name === 'FullName').values;
  } else if (s.refId === "WO_INFO") {
    RUN = s.fields.find((f) => f.name === 'RUN').values;
    RUN_PLUS = s.fields.find((f) => f.name === 'RUN_PLUS').values;
  }
});

return {
  xAxis: {
    type: 'category',
    data: FullName
  },
  yAxis: {
    type: 'value'
  },
  visualMap: [{
    pieces: [{
      gte: 5,
      label: ">= " + RUN,
      color: "green"
    }, {
      lt: 5,
      gt: 0,
      label: "< " + RUN,
      color: "red"
    }],
  }],
  series: [
    {
      data: AVG_RATE_PER_HOUR,
      label: {
        show: true,
        position: 'top',
        formatter: function (data) {
          return (data.value.toFixed(2))
        }
      },
      type: 'bar'
    }
  ]
};

When I try to use the value of RUN for the gte or the lt I get an error

ECharts Execution Error
e.indexOf is not a function

but it works just fine in the lable: