title: django apply widget for all fields
body: <p>Is there a way to apply css class to <strong>ALL</strong> fields instead of doing the following for every single field.
  <br>
  <strong>forms.py</strong></p>
  
  <pre><code>class UserColorsForm(forms.ModelForm):
  
      class Meta:
          model = UserColors
          exclude = ('userid',)
          widgets = {
              'text_color': forms.TextInput(attrs={'class': 'color'}),
              'background_color': forms.TextInput(attrs={'class': 'color'}),
              ... 10 more
          }
  </code></pre>