SwiftUI 2.0

Using SwitchToggleStyle

You can now set a tint color for the on position only in SwiftUI 2.0:

Toggle(isOn: $isToggleOn) {    Text("Red")    Image(systemName: "paintpalette")}.toggleStyle(SwitchToggleStyle(tint: Color.red))Toggle(isOn: $isToggleOn) {    Text("Orange")    Image(systemName: "paintpalette")}.toggleStyle(SwitchToggleStyle(tint: Color.orange))

SwiftUI 1.0

Using ToggleStyle

I created a new ToggleStyle to change the three colors of the Toggle (on color, off color, and the thumb).

struct ColoredToggleStyle: ToggleStyle {    var label = ""    var onColor = Color(UIColor.green)    var offColor = Color(UIColor.systemGray5)    var thumbColor = Color.white        func makeBody(configuration: Self.Configuration) -> some View {        HStack {            Text(label)            Spacer()            Button(action: { configuration.isOn.toggle() } )            {                RoundedRectangle(cornerRadius: 16, style: .circular)                    .fill(configuration.isOn ? onColor : offColor)                    .frame(width: 50, height: 29)                    .overlay(                        Circle()                            .fill(thumbColor)                            .shadow(radius: 1, x: 0, y: 1)                            .padding(1.5)                            .offset(x: configuration.isOn ? 10 : -10))                    .animation(Animation.easeInOut(duration: 0.1))            }        }        .font(.title)        .padding(.horizontal)    }}

Examples of Use

Toggle("", isOn: $toggleState)    .toggleStyle(        ColoredToggleStyle(label: "My Colored Toggle",                           onColor: .green,                           offColor: .red,                           thumbColor: Color(UIColor.systemTeal)))Toggle("", isOn: $toggleState2)    .toggleStyle(        ColoredToggleStyle(label: "My Colored Toggle",                           onColor: .purple))

From the SwiftUI Book

Just use UIAppearance APIs:

UISwitch.appearance().onTintColor = UIColor.blue

It'll of course by default change the appearance of all the instances of UISwitch, as per UIAppearance documentation.

NOTE: Tested as of Xcode 11 beta 5.

SwiftUI 2.0 (Post WWDC-2020)

Using the new SwiftUI enhancements you can use the .toggleStyle modifier.

// Switch tintingToggle(isOn: $order.notifyWhenReady) {    Text("Send notification when ready")}.toggleStyle(SwitchToggleStyle(tint: .accentColor))

Note this only works for iOS14/iPadOS14/macOS11 and above.