Text-color in comments form

Where can I change the font color in the comment field? Now the text is white on a light gray bg. and not visual:
I´ve looked in the comments.css file, but didn´t find a logical line to alter.
My site;
http://hakonzen.net/no-cold-eyes-in-paris-tonight-hommage-to-carlie-bird-parker/

http://wordpress.org/extend/plugins/social/