Examine source code of Oldman

{
  "theme": {
    "images": {
      "theme_frame": "u65jexej.jpg"
    },
    "colors": {
      "frame": "#18a7ba",
      "tab_background_text": "#17acbd"
    }
  },
  "version": "2.0",
  "name": "Oldman",
  "manifest_version": 2,
  "description": "182"
}