I'm using CKEditor

<script src="https://cdn.ckeditor.com/4.18.0/standard/ckeditor.js"></script>

<textarea name="title" class="ckeditor">{!! $cms->title !!}</textarea>

when moving to source view and after adding styles the styles does not appear and they are not saved in database also.

Eg.

I have this span with style

<h1> Welcome <span style="color:#3368bc;">Text</span></h1>

but these styles are not visible when i switch to source view. Any solution to resolve this issue.