hoverColor property
final
The color for the button's Material when a pointer is hovering over it.
If overlayColor returns a non-null color in the MaterialState.hovered state, it will be used instead.
If null, then the value of SwitchThemeData.overlayColor is used in the hovered state. If that is also null, then the value of ThemeData.hoverColor is used.
Implementation
final Color? hoverColor;