Examine source code of Peacock brushstrokes

{
  "theme": {
    "images": {
      "theme_frame": "peacock_brushstrokes_head.jpg"
    },
    "colors": {
      "frame": "#bf8e8e",
      "tab_background_text": "#0d0606"
    }
  },
  "version": "2.0",
  "name": "Peacock brushstrokes",
  "manifest_version": 2,
  "description": "Detail of brush-strokes from a painting of a peacock's tail. By Sushila Burgess."
}