Examine source code of Seattle Night

{
  "theme": {
    "images": {
      "theme_frame": "SeattleNightPersona.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#d15904"
    }
  },
  "version": "2.0",
  "name": "Seattle Night",
  "manifest_version": 2,
  "description": "Photo of sunset over Sound from downtown Seattle."
}