Examine source code of unknown sea

{
  "theme": {
    "images": {
      "theme_frame": "untitled.PNG"
    },
    "colors": {
      "frame": "#2a70fc",
      "tab_background_text": "#cbdaf2"
    }
  },
  "version": "2.0",
  "name": "unknown sea",
  "manifest_version": 2,
  "description": "unknown sea under water"
}