[[UIBarButtonItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]} forState:UIControlStateNormal];

[self.navigationItem.leftBarButtonItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]} forState:UIControlStateNormal];

[self.navigationItem.leftBarButtonItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]} forState:UIControlStateNormal];

UIButton *useButton = [UIButton buttonWithType:UIButtonTypeCustom];
    useButton.frame = CGRectMake(0, 0, 20,17);
    useButton.layer.masksToBounds = NO;
    useButton.layer.shadowOffset = CGSizeMake(3, 3);
    useButton.layer.shadowRadius = 3;
    useButton.layer.shadowOpacity = 0.1;
    useButton.layer.shadowColor = [UIColor blackColor].CGColor;
    useButton.backgroundColor = [UIColor clearColor];
    useButton.tintColor = [UIColor whiteColor];
    [useButton setImage:[UIImage imageNamed:@"image if any"] forState:0];
    [useButton addTarget:self action:@selector(btnBackTapped:) forControlEvents:UIControlEventTouchUpInside];

    [self.navigationItem setRightBarButtonItem:[[UIBarButtonItem alloc] initWithCustomView:useButton]];

[[UIBarButtonItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor blueColor]} forState:UIControlStateNormal];

UIBarButtonItem *rigthBtn = [[UIBarButtonItem alloc] initWithTitle:@"title" style:UIBarButtonItemStylePlain target:self action:@selector(rightBtnTapped:)];

[rigthBtn setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor redColor]} forState:UIControlStateNormal];

[self.navigationItem setRightBarButtonItem:rigthBtn];

navigationController.navigationBar.tintColor = UIColor.COLOR