Examine source code of vega 16

{
  "theme": {
    "images": {
      "theme_frame": "avega.jpg"
    },
    "colors": {
      "frame": "#f2f2ef",
      "tab_background_text": "#f2f5f2"
    }
  },
  "version": "2.0",
  "name": "vega 16",
  "manifest_version": 2
}