Examine source code of Browser Colours Light

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Browser Colours Light",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(255, 255, 255)",
      "toolbar_text": "rgb(255, 159, 0)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(145, 0, 255)",
      "toolbar_field": "rgba(37, 38, 38, 0.12)",
      "toolbar_field_text": "rgb(255, 159, 0)",
      "tab_line": "rgb(255, 159, 0)",
      "popup": "rgb(241, 241, 241)",
      "popup_text": "rgb(255, 97, 255)",
      "tab_loading": "rgb(255, 159, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b0668891-d597-4c76-9830-b380bb97c30b}"
    }
  }
}