Examine source code of Sherlock BBC

{
  "theme": {
    "images": {
      "theme_frame": "PersonasSHg.png"
    },
    "colors": {
      "frame": "#856f6f",
      "tab_background_text": "#523131"
    }
  },
  "version": "2.0",
  "name": "Sherlock BBC",
  "manifest_version": 2,
  "description": "Just luv for Sherlock series!"
}