If you are coming from HTML/CSS and trying to design for the iPhone/iPad, one thing that you are going to want to do is define colors in Objective C using hex values from CSS. Here is the marco that can be used to do that.

    #define UIColorFromRGB(rgbValue) [UIColor \
            colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
            green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
            blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

Simply add the macro to your PCH file and then you can start using hexidecimal colors immediately as follows

UITextField* _stateField = [[UITextField alloc] initWithFrame:CGRectMake(0.0f,10.0f,100.0f,100.0f)]
 _stateField.textColor = UIColorFromRGB(0x488abb);