Controlling the Taxonomy Box Content

Hi all,

I think I have a very basisc question, but I can't get it done. I just like to control the background color of the taxonomy pages, but I fail to do so. My assumption is that is controlled by the Taxonomy Box Content Background. However, this seems to apply only to the header box, that already has its own control, Taxonomy Box Header Background.

For example, check out this page: The content box is light grey, but I like it to be white. The Taxonomy Box Content Background has no effect on this, instead, it affects the header.

Do I misunderstand something or is this a bug?

Thanks in advance and kind regards,