There was an extension called CSS4K2. You can try this one.
If you want some code for reference you can download a free template from www.joomlaworks.net/joomla-templates/free-templates/takai and check the /includes/helper.php file.

Hello there,

You should address this issue to the JCH devs in case they know a workaround.

This is a Joomla! extension forum Abed.

WordPress automatically adds CSS classes to different elements throughout your website. These include both the body class and the post class.

For example, if you view a category archive page and then use the Inspect Tool, you will notice category and category-name CSS classes in the body tag.
You can use this CSS class to style each individual category differently by adding custom CSS that you can use as a starting point.
Don’t forget to change the category name in the CSS class with your own category name.

Ok, but this is a Joomla! forum.
Please keep to the topic