Examine source code of Saki- Tsuruga

{
  "theme": {
    "images": {
      "theme_frame": "tsurugawaiwai.jpg"
    },
    "colors": {
      "frame": "#e7e8ec",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Saki- Tsuruga",
  "manifest_version": 2,
  "description": "Featuring characters from -Saki-.\n\nI wanted the theme to be kept mostly the same as the default."
}