Examine source code of Green for Raechel

{
  "theme": {
    "images": {
      "theme_frame": "Raechelsgreenheader2505.jpg"
    },
    "colors": {
      "frame": "#3d3a3a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Green for Raechel",
  "manifest_version": 2,
  "description": "Soft green ferns and other leaves from the Australian bush. From a photograph by Stephen Calder"
}