hoverColor property Null safety
The color of the highlight for the decoration shown if the container is being hovered over by a mouse.
If filled is true, the hoverColor is blended with fillColor and fills the decoration's container.
If filled is false, and InputDecorator.isFocused is false, the color is blended over the enabledBorder's color.
By default the hoverColor is based on the current Theme.
The decoration's container is the area which is filled if filled is true and bordered per the border. It's the area adjacent to icon and above the widgets that contain helperText, errorText, and counterText.
final Color? hoverColor;