A custom UITextField that allows you to easily set the placeholder color from your storyboard!

CustomTextField.swift

import UIKit
@IBDesignable class CustomTextField: UITextField {
    
    @IBInspectable var placeholderColor: UIColor = UIColor.lightGrayColor() {
    didSet {
        let canEditPlaceholderColor = self.respondsToSelector(Selector("setAttributedPlaceholder:"))
        
        if (canEditPlaceholderColor) {
            self.attributedPlaceholder = NSAttributedString(string: placeholder, attributes:[NSForegroundColorAttributeName: placeholderColor]);
        }
    }
    }
    
}