Examine source code of Dark Blue Night Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Blue",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(17, 34, 55)",
      "toolbar_text": "rgb(208, 208, 222)",
      "frame": "rgb(17, 34, 55)",
      "tab_background_text": "rgb(208, 208, 222)",
      "toolbar_field": "rgb(7, 23, 30)",
      "toolbar_field_text": "rgb(208, 208, 222)",
      "tab_line": "rgb(255, 141, 0)",
      "popup": "rgb(17, 34, 55)",
      "popup_text": "rgb(208, 208, 222)",
      "tab_loading": "rgb(255, 141, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{037a3baa-0501-4f81-9bd5-bd793f25b7f1}"
    }
  }
}