Examine source code of Extermination Daleks

{
  "theme": {
    "images": {
      "theme_frame": "The_Dalek_Empire_Emerges_by_Witch_King_42.jpg"
    },
    "colors": {
      "frame": "#b8b8b8",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Extermination Daleks",
  "manifest_version": 2,
  "description": "exterminate, EXTERMINATE!"
}