Examine source code of Druidic summer

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Druidic summer",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(222, 229, 183)",
      "toolbar_text": "rgb(57, 103, 0)",
      "frame": "rgb(182, 182, 143)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(248, 241, 211)",
      "toolbar_field_text": "rgb(118, 132, 98)",
      "tab_line": "rgb(255, 193, 0)",
      "popup": "rgb(248, 241, 211)",
      "popup_text": "rgb(130, 138, 19)",
      "tab_loading": "rgb(255, 193, 0)"
    }
  }
}