Examine source code of Sonic and Sally

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sonic & Sally",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 168, 1, 0.31)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(9, 16, 16)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 2, 187)",
      "tab_line": "rgb(213, 10, 3)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 8, 184)",
      "tab_loading": "rgb(213, 10, 3)"
    }
  }
}