Examine source code of Green stuff

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green stuff",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(118, 176, 98)",
      "toolbar_text": "rgb(90, 63, 25)",
      "frame": "rgb(186, 240, 181)",
      "tab_background_text": "rgb(87, 59, 20)",
      "toolbar_field": "rgb(240, 226, 205)",
      "toolbar_field_text": "rgb(86, 62, 28)",
      "tab_line": "rgb(91, 65, 29)",
      "popup": "rgb(195, 237, 159)",
      "popup_text": "rgb(91, 65, 29)",
      "button_background_active": "rgb(140, 101, 101)",
      "icons": "rgb(87, 59, 20)",
      "tab_loading": "rgb(91, 65, 29)"
    }
  }
}