import SwiftUI extension Color { #if os(macOS) static let background = Color(NSColor.windowBackgroundColor) static let secondaryBackground = Color(NSColor.underPageBackgroundColor) static let tertiaryBackground = Color(NSColor.controlBackgroundColor) #elseif os(iOS) static let background = Color(UIColor.systemBackground) static let secondaryBackground = Color(UIColor.secondarySystemBackground) static let tertiaryBackground = Color(UIColor.tertiarySystemBackground) #else static let background = Color.black static let secondaryBackground = Color.black static let tertiaryBackground = Color.black #endif }