final class ThemeColor: ThemeColorTemplate {
    public let acent: Color = Color(hex: "#3483FA")
 }

final class ThemeFont: ThemeFontTemplate {
    public var titleL: Font = .system(size: 16)
    ...
}

@main
struct JJUITestAppApp: App {
    
    var body: some Scene {
        let themeColor = ThemeColor()
        let themeFont = ThemeFont()
        let theme = ThemeConfiguration(color: themeColor, font: themeFont)
        ThemeManager.configure(theme: theme)
        return WindowGroup {
            ContentView()
              
        }
    }
}