Examine source code of Night Scene

{
  "theme": {
    "images": {
      "theme_frame": "sherlock_6.png"
    },
    "colors": {
      "frame": "#999999",
      "tab_background_text": "#999999"
    }
  },
  "version": "2.0",
  "name": "Night Scene",
  "manifest_version": 2,
  "description": "Sherlock BBC's Sherlock Holmes (Benedict Cumberbach) and John Watson (Martin Freeman) are called to a crime scene at night."
}