link color not working on iOS 8

Link colors are working fine on iOS 7, but are not displayed on iOS 8.
I'm setting the link attributes like this:

``` objective-c
_lblFooter.linkAttributes = @{ NSForegroundColorAttributeName: [UIColor colorWithRed:151.0f/255.0f green:191.0f/255.0f blue:13.0f/255.0f alpha:1.0f], NSUnderlineStyleAttributeName: [NSNumber numberWithInt:NSUnderlineStyleSingle] };
```
