Examine source code of Mac-Friendly Dark Mode

{
  "name": "Mac-Friendly Dark Mode",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled-1.png"
    },
    "colors": {
      "frame": "rgba(22, 23, 23, 1)",
      "tab_background_text": "rgba(190, 190, 191, 1)",
      "toolbar": "rgba(60, 62, 62, 1)",
      "bookmark_text": "rgba(190, 190, 191, 1)",
      "toolbar_field": "rgba(22, 23, 23, 1)",
      "toolbar_field_text": "rgba(218, 218, 218, 1)",
      "tab_line": "rgba(31, 31, 32, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a46827d-3a9d-4714-88c8-ec282f64f45a}"
    }
  }
}