Am 15.04.2013 um 10:44 schrieb Tim Li <timli2013@outlook.com>:

Now I have to change the color of numbers just before the footnote text so that it can match the color of text area.  I try to do it like this:
 
\def\myfootnotecolor#1{%
    \startcolor[red]#1\stopcolor}
 
\setupfootnotes
   [numbercommand={\myfootnotecolor}]
 
or
 
\setupfootnotes
   [foregroundcolor=red]
 
either method has no effect.

For the number in the running text you have to use

  \setupnote[footnote][textcolor=red]

while for the number in the footnote block you have to use

  \setupnotation[footnote][headcolor=red]

Wolfgang