Styling shortcodes in the backend

I was reading this https://premium.wpmudev.org/blog/create-shortcodes/
about creating your own SC.
Now i would like to style them in the backend text editor of WP (style and text), so for example [MyShortcode] gets styled in red standing out from the rest of the text.
This styling has nothing to do with the one that the shortcode could eventually call in the frontend, just to be clear.