Examine source code of petit four

{
  "theme": {
    "images": {
      "theme_frame": "puchi_1.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#ff00aa"
    }
  },
  "version": "2.0",
  "name": "petit four",
  "manifest_version": 2,
  "description": "那珂川奨オリジナルキャラクターです。"
}