Examine source code of Demon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Demon1.0",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(16, 0, 47)",
      "toolbar_text": "rgb(92, 108, 231)",
      "frame": "rgb(56, 8, 166)",
      "tab_background_text": "rgb(93, 111, 240)",
      "toolbar_field": "rgb(30, 1, 68)",
      "toolbar_field_text": "rgb(118, 219, 236)",
      "tab_line": "rgb(3, 83, 183)",
      "popup": "rgb(1, 2, 65)",
      "popup_text": "rgb(191, 158, 239)",
      "tab_loading": "rgb(3, 83, 183)"
    }
  }
}