title: How to set background color for TextFormField Widget in Flutter?
body: <p>This is the following code where I tried setting TextFormField Widget Color.
  I tried changing the color of the Container Widget and the Card Widget, but I couldn't alter the color of the TextFormField Widget in particular.</p>
  <pre><code>child: Container(
                    height: MediaQuery.of(context).size.height,
                    color: Colors.white,
                    child: Card(
                        color: Colors.blue,
                        child: Form(
                            key: _formKey,
                            child: Column(children: [
      Padding(
                                    padding:
                                        const EdgeInsets.fromLTRB(30, 50, 30, 20),
                                    child: TextFormField(
                                        keyboardType: TextInputType.emailAddress,
                                        decoration: InputDecoration(
                                            border: OutlineInputBorder(
                                            borderSide:
                                                const BorderSide(color: Colors.white),
                                            borderRadius: BorderRadius.circular(25.0),
                                          ),
                                          prefixIcon: Icon(
                                            Icons.email,
                                            color: Colors.blue,
                                          ),
                                          labelText: &quot;Email&quot;,
                                          labelStyle: TextStyle(
                                              color: Colors.black,
                                              fontSize: 18,
                                              fontWeight: FontWeight.w300),
                                        ),
          
  
                          ),
  </code></pre>