Examine source code of Simplistic Elegance

{
  "theme": {
    "images": {
      "theme_frame": "1.PNG"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#adadad"
    }
  },
  "version": "2.0",
  "name": "Simplistic Elegance",
  "manifest_version": 2,
  "description": "Just a simple background, one that's elegant but almost grunge."
}