extension.json

{
  "id": "contentful-color-selector",
  "name": "Color Selector",
  "srcdoc": "./build/index.html",
  "fieldTypes": [
    "Symbol"
  ],
  "parameters": {
    "installation": [
      {
        "id": "colors",
        "type": "Symbol",
        "name": "Colors",
        "description": "A JSON hash of your app's colors.  Keys are the color's name (and what is stored as the value of the field) and values are the hex (with '#') used to make a color swatch by this extension. For example, `{ \"Red\": \"#ff0000\", \"Blue\": \"#0000ff\" }`.",
        "required": true
      }
    ]
  }
}