Examine source code of Glacial top

{
  "theme": {
    "images": {
      "theme_frame": "antarctica_g_top.png"
    },
    "colors": {
      "frame": "#c3c9f0",
      "tab_background_text": "#5426fc"
    }
  },
  "version": "2.0",
  "name": "Glacial top",
  "manifest_version": 2,
  "description": "The top of an Antarctic glacier."
}