Examine source code of Luka Miku

{
  "theme": {
    "images": {
      "theme_frame": "MikuLuka2.jpg"
    },
    "colors": {
      "frame": "#171717",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Luka Miku",
  "manifest_version": 2,
  "description": "I'm not own this chara's, the two belong to vocaloid.\n\nThe pictures aren't painted by myself"
}