Examine source code of Warlocks Den-Voidwalker

{
  "theme": {
    "images": {
      "theme_frame": "top3.jpg"
    },
    "colors": {
      "frame": "#00d9ff",
      "tab_background_text": "#aeadff"
    }
  },
  "version": "2.0",
  "name": "Warlocks Den-Voidwalker",
  "manifest_version": 2,
  "description": "This theme features the most awesome pet any warlock can have out while leveling: the Voidwalker."
}