Examine source code of Earth at Night2

{
  "theme": {
    "images": {
      "theme_frame": "Earth_night.jpg"
    },
    "colors": {
      "frame": "#050000",
      "tab_background_text": "#f7f4f4"
    }
  },
  "version": "2.0",
  "name": "Earth at Night2",
  "manifest_version": 2,
  "description": "Earth at Night photo from space by NASA used in \"Bryce\" rendering.\nSee more from PeakPixels on our YouTube channel."
}