Examine source code of The Colossuss

{
  "theme": {
    "images": {
      "theme_frame": "Dont-fall-off-shadow-of-the-colossus-8894485-1024-768.jpg"
    },
    "colors": {
      "frame": "#615f5f",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "The Colossuss",
  "manifest_version": 2
}