CGRect frame = CGRectMake(0.0, 0.0, self.view.bounds.size.width, 46);
UIView *myTabView = [[UIView alloc] initWithFrame:frame];
[myTabView setBackgroundColor:[UIColor colorWithRed:0.2 green:0.4 blue:0.6 alpha:0.65]];
[myTabView setAlpha:0.5];
[[self.tabBarController tabBar] insertSubview:myTabView atIndex:0];
[myTabView release];
// Above code is used to change Tabbarcolor