Examine source code of Eleventh Doctor

{
  "theme": {
    "images": {
      "theme_frame": "-1.png"
    },
    "colors": {
      "frame": "#17b4bf",
      "tab_background_text": "#3c8bd9"
    }
  },
  "version": "2.0",
  "name": "Eleventh Doctor",
  "manifest_version": 2,
  "description": "New season, new Earth, new Doctor!"
}