Examine source code of Alien Persona Header

{
  "theme": {
    "images": {
      "theme_frame": "Alienhead.jpg"
    },
    "colors": {
      "frame": "#b8b2b2",
      "tab_background_text": "#b0adad"
    }
  },
  "version": "2.0",
  "name": "Alien Persona Header",
  "manifest_version": 2,
  "description": "Dark Alien theme with silver/grey text.\nEnjoy."
}