Brake calipers are brushed aluminium with "Porsche" in black lettering--they're actually very light silver in color:  
 
 
For those with higher bandwidth, a full-res version is 
here.  Before anyone starts giving me grief about the rust, this photo was taken just after the car was unloaded from a trans-Atlantic cargo container...because of the rust!
Cheers!
    Humble Programmer
    ,,,^..^,,,