Examine source code of Lightning rainbow

{
  "theme": {
    "images": {
      "theme_frame": "Untitled-1.jpg"
    },
    "colors": {
      "frame": "#424242",
      "tab_background_text": "#bac"
    }
  },
  "version": "2.0",
  "name": "Lightning rainbow",
  "manifest_version": 2,
  "description": "I made this very very quick, as i was bored. Enjoy! =)"
}