Flutter change textfield underline Color

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I am trying to change the underline color of a textfield when it's inactive/not focused. I am not sure where to make this change, InputDecorationTheme is only changing the underline color for when it's selected. How do I achieve this?

inputDecorationTheme: new InputDecorationTheme(
          labelStyle: new  TextStyle(
              color: Colors.blue[200],
          ),
          hintStyle: new TextStyle(color: Colors.grey),
        ),

I am trying to change this color the textfield to a lighter grey when it's not selected/out of focus.

Best Answer

For those who might need to achieve something similar, change the hintColor in your Theme widget.

new Theme(
          data: new ThemeData(
              //this changes the colour
              hintColor: Colors.grey,
              inputDecorationTheme: new InputDecorationTheme(
                  labelStyle: new TextStyle(color: Colors.blue))));

Related Solutions

Flutter – Change TextField’s Underline in Flutter

While these other answers may somehow work, you should definitely not use it. That's not the proper way to get a custom theme in Flutter.

A much more elegant solution is as followed :

final theme = Theme.of(context);

return new Theme(
  data: theme.copyWith(primaryColor: Colors.red),
  child: new TextField(
    decoration: new InputDecoration(
      labelText: "Hello",
      labelStyle: theme.textTheme.caption.copyWith(color: theme.primaryColor),
    ),
  ),
);

At the same time, if you just want to show an error (Red), use errorText of InputDecoration instead. It will automatically set the color to red.

Flutter – How to change textField underline color

Just used -:

decoration: InputDecoration(        
              enabledBorder: UnderlineInputBorder(      
                      borderSide: BorderSide(color: Colors.cyan),   
                      ),  
              focusedBorder: UnderlineInputBorder(
                      borderSide: BorderSide(color: Colors.cyan),
                   ),  
             ),

it works for me :)

Best Answer

Related Solutions

Flutter – Change TextField’s Underline in Flutter

Flutter – How to change textField underline color

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