SharePoint List Formatting : "Wixing Moon"

This example creates SVG image representing a wixing moon based on the value of number type column.

JSON

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "display": "flex",
    "flex-direction": "column",
    "width": "120px",
    "height": "140px"
  },
  "children": [
    {
      "elmType": "div",
      "style": {
        "position": "relative",
        "margin": "2px",
        "width": "120px",
        "height": "120px"
      },
      "children": [
        {
          "elmType": "svg",
          "style": {
            "fill": "#555555",
            "position": "absolute",
            "top": "0",
            "right": "0"
          },
          "attributes": {
            "viewBox": "-12 -12 24 24"
          },
          "children": [
            {
              "elmType": "path",
              "attributes": {
                "d": "M 0 -10.5 C 5.79894 -10.5 10.5 -5.79894 10.5 0 C 10.5 5.79894 5.79894 10.5 0 10.5 C -5.79894 10.5 -10.5 5.79894 -10.5 0 C -10.5 -5.79894 -5.79894 -10.5 0 -10.5 Z"
              }
            }
          ]
        },
        {
          "elmType": "svg",
          "style": {
            "fill": "#FFFF00",
            "position": "absolute",
            "top": "0",
            "right": "0"
          },
          "attributes": {
            "viewBox": "-12 -12 24 24"
          },
          "children": [
            {
              "elmType": "path",
              "attributes": {
                "d": "='M 0 -10 C 5.5228 -10 10 -5.5228 10 0 C 10 5.5228 5.5228 10 0 10 C ' + (5.5228-2*5.5228*(@currentField)) + ' 10 ' + (10-20*(@currentField)) + ' 5.5228 ' + (10-20*(@currentField)) + ' 0 C ' + (10-20*(@currentField)) + ' -5.5228 '+ (5.5228-2*5.5228*(@currentField)) + ' -10 0 -10 Z'"
              }
            }
          ]
        }
      ]
    },
    {
      "elmType": "div",
      "txtContent": "=if(@currentField.displayValue=='', '0%' , (100*(@currentField)+'%'))",
      "style": {
        "position": "relative",
        "margin":"2px",
        "font-size": "14px",
        "font-weight": "bold"
      }
    }
  ]
}

If you would like to change colors - background and moon, modify hex color codes, #555555 is for background and #FFFF00 is for light side. Also, column size is as following: