Styling asides in main blog page with K2

Which parts of the CSS do I use in order to display the information from my Asides category differently? In effect, I want only some of the meta tags to show for that category only.

I’ve looked at the K2 CSS but I cannot quite work out how the meta is styled for particular categories.

Or maybe this needs to be done somehow within the Loop. (I hope not.)

All help gratefully received.