Please look at the screenshot below.
I set all the tint colors from the same UIColor object for the UINavigationBar, search bar and toolbar at the bottom. But for so
It differs because of default UINavigationBar blur effect. I can suggest to set 2px width stretchable background image with your color. Something like this:
UIImage *image = [UIImage imageNamed:@"yourBlueImage"];
image = [image stretchableImageWithLeftCapWidth:image.size.width / 2.0f topCapHeight:0.0f];
[yourNavBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
It's like a trick, because when you set custom backgroundImage blur effect will be disabled and you'll get exact color.