Examine source code of Winter Sunset

{
  "theme": {
    "images": {
      "theme_frame": "WinterSunset.jpg"
    },
    "colors": {
      "frame": "#575050",
      "tab_background_text": "#6e216b"
    }
  },
  "version": "2.0",
  "name": "Winter Sunset",
  "manifest_version": 2,
  "description": "Look at the title. :)"
}