Examine source code of Pine Tree Sunset

{
  "theme": {
    "images": {
      "theme_frame": "pinetreesusnset.jpg"
    },
    "colors": {
      "frame": "#9916f7",
      "tab_background_text": "#cda4f5"
    }
  },
  "version": "2.0",
  "name": "Pine Tree Sunset",
  "manifest_version": 2,
  "description": "Sunset image on pine tree branches"
}