Examine source code of Pitty Chiaroscuro

{
  "theme": {
    "images": {
      "theme_frame": "bg1280.jpg"
    },
    "colors": {
      "frame": "#22ccbe",
      "tab_background_text": "#1ac7bb"
    }
  },
  "version": "2.0",
  "name": "Pitty Chiaroscuro",
  "manifest_version": 2
}