Unable to style system message text

I no longer require this change. I had been placing my notifications at the top of the body through the yjsg_custom_params.php file. These notifications did not play nice with the off canvas icon so had styled the notification icon, title and text and moved them over to the right slightly. This changed the title for system messages but I was unable to style the text of the system messages.

I have subsequently but changed how I handled the notifications by using a custom html module and publishing it in a user position. I am now able to drop the styling and do not deed to style the system message text. The framework should probably allow for this though.