Examine source code of Preto e Branco

{
  "name": "Preto e Branco",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "índice.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.95)",
      "tab_background_text": "rgba(204, 202, 202, 0.85)",
      "toolbar": "rgba(65, 66, 66, 1)",
      "bookmark_text": "rgba(204, 202, 202, 0.85)",
      "toolbar_field": "rgba(0, 0, 0, 0.81)",
      "toolbar_field_text": "rgba(204, 202, 202, 0.85)"
    }
  }
}