Examine source code of Game set - Diablo 3

{
  "theme": {
    "images": {
      "theme_frame": "Gameset-Diablo3.jpg"
    },
    "colors": {
      "frame": "#b5b5b5",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Game set - Diablo 3",
  "manifest_version": 2,
  "description": "Here's a persona for game fans, Especially Diablo Serie"
}