Set border and shadow color with runtime attributes on xib / storyboard

CALayer+IBColor.h

//
//  CALayer+IBColor.h
//  FunWithRuntimeAttributes
//
//  Created by Mike Woelmer on 5/13/14.
//  Copyright (c) 2014 atomicobject. All rights reserved.
//

@import UIKit;
@import QuartzCore;

@interface CALayer (IBColor)

@property (nonatomic) UIColor *borderIBColor;
@property (nonatomic) UIColor *shadowIBColor;

@end

CALayer+IBColor.m

//
//  CALayer+IBColor.m
//  FunWithRuntimeAttributes
//
//  Created by Mike Woelmer on 5/13/14.
//  Copyright (c) 2014 atomicobject. All rights reserved.
//

#import "CALayer+IBColor.h"

@implementation CALayer (IBColor)

- (void)setBorderIBColor:(UIColor *)color {
    self.borderColor = color.CGColor;
}

- (UIColor *)borderIBColor {
    return [UIColor colorWithCGColor:self.borderColor];
}

- (void)setShadowIBColor:(UIColor *)color {
    self.shadowColor = color.CGColor;
}

- (UIColor *)shadowIBColor {
    return [UIColor colorWithCGColor:self.shadowColor];
}

@end