Examine source code of Beautiful Blues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Beautiful Blues",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(11, 27, 77)",
      "toolbar_text": "rgb(221, 231, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(221, 231, 255)",
      "toolbar_field": "rgb(0, 8, 40)",
      "toolbar_field_text": "rgb(221, 231, 255)",
      "tab_line": "rgb(221, 231, 255)",
      "popup": "rgb(11, 27, 77)",
      "popup_text": "rgb(177, 201, 255)",
      "icons": "rgb(177, 201, 255)",
      "popup_border": "rgb(177, 201, 255)",
      "sidebar_border": "rgb(221, 231, 255)",
      "sidebar_text": "rgb(221, 231, 255)",
      "sidebar": "rgb(11, 27, 77)",
      "tab_loading": "rgb(221, 231, 255)",
      "toolbar_top_separator": "rgba(28, 42, 72, 0)",
      "toolbar_vertical_separator": "rgba(28, 42, 72, 0)"
    }
  }
}