Examine source code of Butterfly Cloud

{
  "theme": {
    "images": {
      "theme_frame": "personaheader.jpg"
    },
    "colors": {
      "frame": "#4f8da0",
      "tab_background_text": "#dae8ec"
    }
  },
  "version": "2.0",
  "name": "Butterfly Cloud",
  "manifest_version": 2,
  "description": "Shock Blue butterfly against a dark blue \"cloudy\" background"
}