Examine source code of full black

{
  "name": "full black",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "index.jpg"
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(97, 80, 80, 1)",
      "toolbar_field_text": "rgba(185, 145, 186, 1)",
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(201, 173, 173, 1)",
      "bookmark_text": "rgba(196, 172, 172, 1)"
    }
  }
}