Examine source code of Twilight Scene

{
  "theme": {
    "images": {
      "theme_frame": "Twilightgro1.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#9c0505"
    }
  },
  "version": "2.0",
  "name": "Twilight Scene",
  "manifest_version": 2,
  "description": "Pictures copyright by Google!\nI hope u will like it :D Edited on 27th March 2010"
}