Examine source code of onlinework

{
  "theme": {
    "images": {
      "theme_frame": "online.jpg"
    },
    "colors": {
      "frame": "#d9d9d9",
      "tab_background_text": "#1b3d07"
    }
  },
  "version": "2.0",
  "name": "onlinework",
  "manifest_version": 2,
  "description": "online brand style"
}