[SOLVED] Image Border

Hello!

I saw a website, that had some images that were normal, then some that had a border around the outside of it. I clicked and drug the image, and noticed that the border was part of the theme, not the image.

I would like to know how to do this on my website, if that is possible!

I have already submitted this question, but I wasn't clear that both my site, and the one I saw this border on, use atahualpa. Sorry for the confusion.

Thanks!