Examine source code of Robostrike

{
  "theme": {
    "images": {
      "theme_frame": "bannirepersonasremplie.jpg"
    },
    "colors": {
      "frame": "#92b8d9",
      "tab_background_text": "#527cde"
    }
  },
  "version": "2.0",
  "name": "Robostrike",
  "manifest_version": 2,
  "description": "Robostrike is a free multiplayer and strategic game. Join the community !"
}