Examine source code of Purple Mountain

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Mountain",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.64)",
      "toolbar_text": "rgb(203, 155, 255)",
      "frame": "rgb(43, 9, 62)",
      "tab_background_text": "rgb(81, 44, 116)",
      "toolbar_field": "rgba(104, 45, 191, 0.43)",
      "toolbar_field_text": "rgba(211, 151, 255, 0.53)",
      "tab_line": "rgb(121, 0, 255)",
      "popup": "rgba(71, 25, 91, 0.87)",
      "popup_text": "rgb(214, 159, 255)",
      "tab_loading": "rgb(121, 0, 255)"
    }
  }
}