Change background of a panel

Hello,
I need to change a background color of only a panel in a page with several panels.
It should be a simple thing to do. But I see I need to modify css and I am not finding the unique id of the panel I need to modify.
Can you help me?
Can you in future consider to add background color to style menu?
Thanks,
Mario

I don't think the PrimeNG Panel component which Radzen uses for Angular applications supports a background setting. Can you provide more info about your requirement? What panel needs to change?