Examine source code of Transparent lake.

{
  "theme": {
    "images": {
      "theme_frame": "bup--614-sukitooru-suimenn-100p-sy-2360.jpg"
    },
    "colors": {
      "frame": "#ecccf0",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Transparent lake.",
  "manifest_version": 2,
  "description": "- --透き通る湖面。-- -"
}