`customStyles` are not saved

[geronimol]

Is there an existing issue for this?

• [X] I have searched the existing issues

Flutter Quill version

9.5.3

Steps to reproduce

I want to set the default text color to red:

QuillEditor.basic(
  configurations: QuillEditorConfigurations(
    controller: _controller,
    autoFocus: true,
    customStyles: const DefaultStyles(
      paragraph: DefaultListBlockStyle(
        TextStyle(color: Colors.red),
        VerticalSpacing(0, 0),
        VerticalSpacing(0, 0),
        null,
        null,
      ),
    ),
  ),
),

The editor shows default text color as red

But when I save it using

_controller.document.toDelta()

print()

_controller.document.toDelta().toJson()

print()

Related: #1925

Expected results

Using controller.document.toDelta() should save the customStyles

Actual results

customStyles aren't saved when using controller.document.toDelta()

Code sample

Code sample

```dart [Paste your code here] ```

Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

Logs

Logs

```console [Paste your logs here] ```

[CatHood0]

Custom styles is just a visual configurations, them never have any effect on the Delta result

[EchoEllet]

Custom styles is just a visual configurations, them never have any effect on the Delta result

I think what he might try to do is to have the same content style as Delta JS (#1925), I would suggest changing the style in the Quill JS Editor Element/Component.