NSAttributedStringKey.foregroundColor не работает

Это работает:

   extension HomeViewController:  ZSWTappableLabelTapDelegate {
        static let urlAttributeName = NSAttributedStringKey(rawValue: "URL")

        func setLinks(){
            termsPrivacyLabel.tapDelegate = self

            enum LinkType: String {
                case privacy = "privacy"
                case terms = "terms"

                var URL: Foundation.URL {
                    switch self {
                    case .privacy:
                        return Foundation.URL(string: "myprivacyurl")!
                    case .terms:
                        return Foundation.URL(string: "mytermsurl")!
                    }
                }
            }

            let options = ZSWTaggedStringOptions()
            options["link"] = .dynamic({ tagName, tagAttributes, stringAttributes in
                guard let typeString = tagAttributes["type"] as? String,
                    let type = LinkType(rawValue: typeString) else {
                        return [NSAttributedStringKey: AnyObject]()
                }

                return [
                    .tappableRegion: true,
                    .tappableHighlightedForegroundColor: UIColor.white,
                    .foregroundColor: UIColor.lightGray,
                    .underlineStyle: NSUnderlineStyle.styleNone.rawValue,
                    .font: UIFont.boldSystemFont(ofSize: 13.0),
                    HomeViewController.urlAttributeName: type.URL
                ]
            })

            let string = NSLocalizedString("By signing in, you agree to the <link type='terms'>terms</link> and <link type='privacy'>privacy</link>.", comment: "")
            termsPrivacyLabel.attributedText = try? ZSWTaggedString(string: string).attributedString(with: options)
        }

        func tappableLabel(_ tappableLabel: ZSWTappableLabel, tappedAt idx: Int, withAttributes attributes: [NSAttributedStringKey : Any] = [:]) {
            guard let URL = attributes[HomeViewController.urlAttributeName] as? URL else {
                return
            }

            if #available(iOS 9, *) {
                show(SFSafariViewController(url: URL), sender: self)
            } else {
                UIApplication.shared.openURL(URL)
            }
        }