Examine source code of Dark-yellow Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark-yellow",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(41, 41, 30)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(29, 27, 23)",
      "tab_background_text": "rgb(236, 237, 230)",
      "toolbar_field": "rgb(49, 48, 45)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(194, 202, 56)",
      "popup": "rgb(48, 46, 38)",
      "popup_text": "rgb(221, 231, 242)",
      "tab_loading": "rgb(194, 202, 56)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fbe038f4-e4fc-4be9-a1ab-d9e5d29c948c}"
    }
  }
}