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