Examine source code of St Tropez sunset

{
  "theme": {
    "images": {
      "theme_frame": "sunset_persona_header_3.jpg"
    },
    "colors": {
      "frame": "#dfe396",
      "tab_background_text": "#ccbdde"
    }
  },
  "version": "2.0",
  "name": "St Tropez sunset",
  "manifest_version": 2
}