Answers for "how to apply border color inside in flutter"

add border color to acouintainer in flutter

Container(
  height: 100,
  width: 100,
  decoration: BoxDecoration(
    border: Border.all(
      color: Colors.blue,
    ),
    borderRadius: BorderRadius.circular(10.0),
  ),
  child: Center(
    child: Text('mrflutter.com'),
  ),
),

flutter text border color

Stack(
  children: <Widget>[
    // Stroked text as border.
    Text(
      'Greetings, planet!',
      style: TextStyle(
        fontSize: 40,
        foreground: Paint()
          ..style = PaintingStyle.stroke
          ..strokeWidth = 6
          ..color = Colors.blue[700],
      ),
    ),
    // Solid text as fill.
    Text(
      'Greetings, planet!',
      style: TextStyle(
        fontSize: 40,
        color: Colors.grey[300],
      ),
    ),
  ],
)