Examine source code of best twilight theme

{
  "theme": {
    "images": {
      "theme_frame": "twilightheader.PNG"
    },
    "colors": {
      "frame": "#f70303",
      "tab_background_text": "#fc0808"
    }
  },
  "version": "2.0",
  "name": "best twilight theme",
  "manifest_version": 2,
  "description": "the best twilight theme on firefo because i made it :)"
}