Examine source code of Tema-Escuro

{
  "name": "Tema-Escuro",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "xbox-one-x-logo-papel-de-parede-2880x960-19166_104.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(181, 181, 181, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(189, 189, 189, 1)"
    }
  }
}