Examine source code of MInimal green background

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green and simple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-034-e0dfa84411058d2e5627f19f1ea501ca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 60, 37)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(11, 29, 17)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(11, 29, 17)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(23, 60, 37)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a34be905-2b38-4ee6-8d9b-440fd412534a}"
    }
  }
}