Examine source code of Metro Transit

{
  "name": "Metro Transit",
  "manifest_version": 2,
  "version": "9.0",
  "theme": {
    "images": {
      "theme_frame": "Metro Transit HTML Theme.svg"
    },
    "colors": {
      "frame": "rgba(43, 91, 194, 1)",
      "tab_background_text": "rgba(255, 210, 0, 1)",
      "toolbar": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(237, 26, 44, 1)",
      "toolbar_field": "rgba(120, 132, 143, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(237, 26, 44, 0)"
    }
  }
}