underline text flutter color

Text(
  'Hello world',
  style: TextStyle(
    decoration: TextDecoration.underline,
  ),
)

decoration: InputDecoration(        
  enabledBorder: UnderlineInputBorder(      
    borderSide: BorderSide(color: theColor),   
  ),  
  focusedBorder: UnderlineInputBorder(
    borderSide: BorderSide(color: theColor),
  ),
  border: UnderlineInputBorder(
    borderSide: BorderSide(color: theColor),
  ),
)

Text("Your text",
      style: TextStyle(
             color: Colors.white
             decoration: TextDecoration.underline,
             decorationColor: Colors.yellow,
          ))

Text(
  'Hello world',
  style: TextStyle(
    decoration: TextDecoration.underline,
  ),
)