outgoingContentTextStyle property
Text style for outgoing message content.
Widget build(BuildContext context) {
  return Scaffold(
    body: SfChatTheme(
      data: SfChatThemeData(
        outgoingContentTextStyle: TextStyle(
          fontSize: 14.0,
          color: Colors.white,
        ),
      ),
      child: SfChat(),
    ),
  );
}
Implementation
final TextStyle? outgoingContentTextStyle;