Add to your light theme:
<item name="switchBarStyle">@style/Widget.SwitchBar.Light</item>
<item name="switchBarTheme">@style/ThemeOverlay.SwitchBar</item>
<item name="switchBarBackgroundNormal">@color/switchbar_background_light</item>
<item name="switchBarBackgroundDisabled">@color/switchbar_background_light</item>
Add to your dark theme:
<item name="switchBarStyle">@style/Widget.SwitchBar</item>
<item name="switchBarTheme">@style/ThemeOverlay.SwitchBar</item>
<item name="switchBarBackgroundNormal">@color/switchbar_background_dark</item>
<item name="switchBarBackgroundDisabled">@color/switchbar_background_dark</item>