Background color overlay for navbar blur

RCCViewController.m

// Line 477
if (![viewController.navigationController.navigationBar viewWithTag:BLUR_NAVBAR_TAG]) {

  UIBlurEffectStyle *blurStyle = UIBlurEffectStyleLight;
  NSString *navBarBlurStyle = self.navigatorStyle[@"navBarBlurStyle"];

  if (navBarBlurStyle) {
    if ([navBarBlurStyle isEqualToString:@"extralight"]) {
      blurStyle = UIBlurEffectStyleExtraLight;
    }
    if ([navBarBlurStyle isEqualToString:@"dark"]) {
      blurStyle = UIBlurEffectStyleDark;
    }
    if ([navBarBlurStyle isEqualToString:@"regular"]) {
      blurStyle = UIBlurEffectStyleRegular;
    }
    if ([navBarBlurStyle isEqualToString:@"prominent"]) {
      blurStyle = UIBlurEffectStyleProminent;
    }
  }

  [self storeOriginalNavBarImages];

  [viewController.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
  viewController.navigationController.navigationBar.shadowImage = [UIImage new];
  UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:blurStyle];
  UIVisualEffectView *blur = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
  CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
  blur.frame = CGRectMake(0, -1 * statusBarFrame.size.height, viewController.navigationController.navigationBar.frame.size.width, viewController.navigationController.navigationBar.frame.size.height + statusBarFrame.size.height);
  blur.userInteractionEnabled = NO;
  blur.tag = BLUR_NAVBAR_TAG;

  // Background color overlay for blur
  if (navBarBackgroundColor) {
    UIColor *color = navBarBackgroundColor != (id)[NSNull null] ? [RCTConvert UIColor:navBarBackgroundColor] : nil;
    UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectZero];
    backgroundView.frame = CGRectMake(0, -1 * statusBarFrame.size.height, viewController.navigationController.navigationBar.frame.size.width, viewController.navigationController.navigationBar.frame.size.height + statusBarFrame.size.height);
    backgroundView.backgroundColor = color;
    [viewController.navigationController.navigationBar insertSubview:backgroundView atIndex:0];
    [viewController.navigationController.navigationBar sendSubviewToBack:backgroundView];
  }

  [viewController.navigationController.navigationBar insertSubview:blur atIndex:0];
  [viewController.navigationController.navigationBar sendSubviewToBack:blur];
}