Examine source code of Miku Vocaloid

{
  "theme": {
    "images": {
      "theme_frame": "persona88.png"
    },
    "colors": {
      "frame": "#def7f6",
      "tab_background_text": "#e4f9f8"
    }
  },
  "version": "2.0",
  "name": "Miku Vocaloid",
  "manifest_version": 2,
  "description": "Vocaloid ^^"
}