Examine source code of Red Theme

{
  "name": "Red Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Zrzut ekranu 2021-03-17 204908.png"
    },
    "colors": {
      "frame": "rgba(163, 21, 21, 1)",
      "tab_background_text": "rgba(150, 71, 71, 1)",
      "toolbar": "rgba(212, 32, 32, 0.85)",
      "bookmark_text": "rgba(219, 13, 13, 1)",
      "toolbar_field": "rgba(117, 11, 11, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}