Examine source code of Winter Splendor

{
  "theme": {
    "images": {
      "theme_frame": "header154.jpg"
    },
    "colors": {
      "frame": "#d4d0d0",
      "tab_background_text": "#f0ee65"
    }
  },
  "version": "2.0",
  "name": "Winter Splendor",
  "manifest_version": 2,
  "description": "Snow covered winter woods."
}