{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative"
  },
  "children": [
    {
      "elmType": "div",
      "attributes": {
        "class": {
          "operator": "?",
          "operands": [
            {
              "operator": "<=",
              "operands": [
                "[$DueDate]",
                "@now"
              ]
            },
            "sp-field-severity--severeWarning",
            {
              "operator": "?",
              "operands": [
                {
                  "operator": ">",
                  "operands": [
                    {
                      "operator": "-",
                      "operands": [
                        1,
                        {
                          "operator": "/",
                          "operands": [
                            {
                              "operator": "Number()",
                              "operands": [
                                {
                                  "operator": "-",
                                  "operands": [
                                    "[$DueDate]",
                                    "@now"
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                              ]
                            },
                            {
                              "operator": "Number()",
                              "operands": [
                                {
                                  "operator": "-",
                                  "operands": [
                                    "[$DueDate]",
                                    "[$StartDate]"
                                  ]
                                }
                              ]
                            }
                          ]
                        }
                      ]
                    },
                    0.7
                  ]
                },
                "sp-field-severity--warning",
                "sp-field-severity--good"
              ]
            }
          ]
        }
      },
      "style": {
        "min-height": "inherit",
        "width": {
          "operator": "?",
          "operands": [
            {
              "operator": "<=",
              "operands": [
                "[$DueDate]",
                "@now"
              ]
            },
            "100%",
            {
              "operator": "+",
              "operands": [
                {
                  "operator": "*",
                  "operands": [
                    {
                      "operator": "-",
                      "operands": [
                        1,
                        {
                          "operator": "/",
                          "operands": [
                            {
                              "operator": "Number()",
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                                {
                                  "operator": "-",
                                  "operands": [
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                            },
                            {
                              "operator": "Number()",
                              "operands": [
                                {
                                  "operator": "-",
                                  "operands": [
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                                    "[$StartDate]"
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                },
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      }
    },
    {
      "elmType": "span",
      "txtContent": "@currentField",
      "style": {
        "position": "absolute",
        "left": "8px"
      },
      "attributes": {
        "class": "ms-fontColor-neutralSecondary"
      }
    }
  ]
}