Custom css for Avia Layout Builder

I’m using an Enfold Child theme. How do I make my custom css show up in the Avia Layout Builder?

Here’s an example..

I’m using the Icon Box in the ALB and am using the Title field. In the site front-end, the Icon Box Title is in an h3 tag. In my child theme I have set the css so that h3 title is orange. How do I make that title apear orange when in the ALB?

I know that if I had the usual WP editor, I could add the same css to an editor-style.css (assuming that was enabled in the theme) but I don’t know how to do it with the ALB…

Hope you can help!