Examine source code of Desert Valley

{
  "theme": {
    "images": {
      "theme_frame": "DesertValleyH1.jpg"
    },
    "colors": {
      "frame": "#e01b1b",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Desert Valley",
  "manifest_version": 2,
  "description": "This was taken (it's actually two pictures side-by-side) at Red Rock, west of Las Vegas."
}