Examine source code of Dark Theme

{
  "name": "Dark Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "IMG_20210525_190459.jpg"
    },
    "colors": {
      "frame": "rgba(23, 91, 237, 1)",
      "tab_background_text": "rgba(227, 29, 29, 1)",
      "toolbar": "rgba(82, 3, 3, 1)",
      "bookmark_text": "rgba(237, 9, 9, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(48, 32, 32, 1)",
      "tab_line": "rgba(171, 94, 94, 1)"
    }
  }
}