Examine source code of Natural Bluegreen

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#807c7c",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Natural Bluegreen",
  "manifest_version": 2,
  "description": "A natural scene from a lovely beach and sand atmosphere make your FF corner more awesome. Blue -- Sky | Green -- Tree || Here you have natural bluegreen. Enjoy."
}