Examine source code of Westminster Dawn

{
  "theme": {
    "images": {
      "theme_frame": "FF_London_1_Westm_3_k.jpg"
    },
    "colors": {
      "frame": "#6f8ea8",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Westminster Dawn",
  "manifest_version": 2,
  "description": "This is from an image taken in summer 2010 from the London Eye.\nLondon lovers, enoy it!"
}