Examine source code of luca_s

{
  "theme": {
    "images": {
      "theme_frame": "computer-hd-wallpaper47.jpg"
    },
    "colors": {
      "frame": "#12106e",
      "tab_background_text": "#12106e"
    }
  },
  "version": "2.0",
  "name": "luca_s",
  "manifest_version": 2,
  "description": "blue_red-black key"
}