Examine source code of Sweet Valentine

{
  "theme": {
    "images": {
      "theme_frame": "valentine.jpg"
    },
    "colors": {
      "frame": "#ffee99",
      "tab_background_text": "#660033"
    }
  },
  "version": "2.0",
  "name": "Sweet Valentine",
  "manifest_version": 2,
  "description": "Abstract pink and yellow valentines hearts"
}