Examine source code of Red Nautilus

{
  "theme": {
    "images": {
      "theme_frame": "NautilusTopcopy.jpg"
    },
    "colors": {
      "frame": "#3b3b3b",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Red Nautilus",
  "manifest_version": 2,
  "description": "Red nautilus shells with a white flower/root design"
}