Examine source code of Derwent Water

{
  "name": "Derwent Water",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "derwent water.jpg"
    },
    "colors": {
      "frame": "rgba(105, 106, 108, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  }
}