Miguel Rubio-Roy wrote:
>> Something like this:
>> 
>> \deffootnotemark{\textsuperscript{\colorbox{red}%
>> {\textcolor{white}{\thefootnotemark}}}}
>> 
>> in the preamble. Use koma-script class.
> 
> 
> Yago and Charles,
>   Thanks for your help. I think I'll need something more refined, though.
> 
>   The footnotemark effectively appears white, now. However, it appears
>   white
> both in the text and in the actual footnote.
>   The background is colored where the footnotemark is placed in the text,
>   but at
> the bottom of the page, where footnote appears, the background is white,
> so I need regular black text.
>   Is there a way to use different colors for the footnotemark for the text
>   and
> the footnote?
> 
> Miguel

Strange. Here it works. Try to take away the \usepackage{footmisc}

Charles