Support iOS and macOS

Color+RawRepresentable.swift

import Foundation
import SwiftUI
#if os(macOS)
import AppKit
public typealias CrossPlatformColor = NSColor
#else
import UIKit
public typealias CrossPlatformColor = UIColor
#endif

extension Color: RawRepresentable {
  public init?(rawValue: String) {
    guard let data = Data(base64Encoded: rawValue) else {
      self = .black
      return
    }
        
    do {
      let color = try NSKeyedUnarchiver.unarchivedObject(ofClass: CrossPlatformColor.self, from: data) ?? .black
      self = Color(color)
    } catch {
      self = .black
    }
  }

  public var rawValue: String {
    do {
      let data = try NSKeyedArchiver.archivedData(withRootObject: CrossPlatformColor(self), requiringSecureCoding: false) as Data
      return data.base64EncodedString()
            
    } catch {
      return ""
    }
  }
}