Examine source code of Tokyo Night Custom

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tokyo Night Custom",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(26, 27, 38)",
      "toolbar_text": "rgb(137, 145, 198)",
      "frame": "rgb(19, 19, 26)",
      "tab_background_text": "rgb(181, 186, 209)",
      "toolbar_field": "rgb(26, 27, 38)",
      "toolbar_field_text": "rgb(137, 145, 198)",
      "tab_line": "rgb(137, 145, 198)",
      "popup": "rgb(26, 27, 38)",
      "popup_text": "rgb(137, 145, 198)",
      "tab_loading": "rgb(137, 145, 198)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1029abd-cbc9-414f-be29-3d837e34ae25}"
    }
  }
}