Examine source code of hackers.town

{
  "name": "hackers.town",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "heckers-town-07.png"
    },
    "colors": {
      "frame": "rgba(2, 87, 5, 0.5)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(37, 161, 39, 0.5)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.5)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}