How to add customised css to CDN hosted ckeditor

Method 1 – Load CKEditor via CDN and Configure Custom CSS:

<script src="https://cdn.ckeditor.com/4.16.2/standard/ckeditor.js"></script>
<script>
    CKEDITOR.replace('editor1', {
        contentsCss: 'path/to/your/custom.css'
    });
</script>

OR

<script>
    CKEDITOR.replace('editor1', {
        contentsCss: 'body{  color: #fff }',
    });
</script>

Method 2 – Inline Configuration:

If you want to avoid creating a separate CSS file, you can inject CSS directly using the config.contentsCss option.

<script src="https://cdn.ckeditor.com/4.16.2/standard/ckeditor.js"></script>
<script>
    CKEDITOR.replace('editor1', {
        on: {
            instanceReady: function() {
                this.document.appendStyleText('.cke_editable { background-color: #f0f0f0; }');
            }
        }
    });
</script>

Method 3 – Using CKEditor Plugins:

If you want more advanced color options, you can use CKEditor’s plugins. Since you’re using a CDN, you can specify the plugins and configuration options inline.

Include the CKEditor with the color button plugin from the CDN:

<script src="https://cdn.ckeditor.com/4.16.2/full/ckeditor.js"></script>

Configure the editor to include the colorbutton plugin:

<script>
    CKEDITOR.replace('editor1', {
        extraPlugins: 'colorbutton',
        toolbar: [
            { name: 'colors', items: ['TextColor', 'BGColor'] }
        ],
        colorButton_colors: 'CF5D4E,454545,FFF,CCC,000',
        colorButton_enableAutomatic: false
    });
</script>