- Electron version: 0.37.5
- Operating system: Mac OS X 10.11.4

When I pass `backgroundColor: '#FF0000' to a window, the color that shows up on the screen is actually '#FF301E'. 

atom/browser/api/atom_api_web_contents.cc
return web_contents()->GetRenderProcessHost()->GetID();
}
bool WebContents::Equal(const WebContents* web_contents) const {
  return GetID() == web_contents->GetID();
}
void WebContents::LoadURL(const GURL& url, const mate::Dictionary& options) {
  if (!url.is_valid()) {
    Emit("did-fail-load",
         static_cast<int>(net::ERR_INVALID_URL),
         net::ErrorToShortString(net::ERR_INVALID_URL),
         url.possibly_invalid_spec(),
         true);
    return;
  }
  content::NavigationController::LoadURLParams params(url);
  GURL http_referrer;
  if (options.Get("httpReferrer", &http_referrer))
    params.referrer = content::Referrer(http_referrer.GetAsReferrer(),
                                        blink::WebReferrerPolicyDefault);
  std::string user_agent;
  if (options.Get("userAgent", &user_agent))
    SetUserAgent(user_agent);
  std::string extra_headers;
  if (options.Get("extraHeaders", &extra_headers))
    params.extra_headers = extra_headers;
  params.transition_type = ui::PAGE_TRANSITION_TYPED;
  params.should_clear_history_list = true;