fillColor property

MaterialStateProperty<Color?>? fillColor
final

The color that fills the radio button, in all WidgetStates.

Resolves in the following states:

This example resolves the fillColor based on the current WidgetState of the Radio, providing a different Color when it is WidgetState.disabled.
link 
Radio<int>(
  value: 1,
  groupValue: 1,
  onChanged: (_){},
  fillColor: WidgetStateProperty.resolveWith<Color>((Set<WidgetState> states) {
    if (states.contains(WidgetState.disabled)) {
      return Colors.orange.withOpacity(.32);
    }
    return Colors.orange;
  })
)

If specified, overrides the default value of Radio.fillColor.

Implementation

final MaterialStateProperty<Color?>? fillColor;