the button for submitting a comment is currently clashing with the template and can not be see very well. Where can I find CSS that controls that? I primaraly need to change text color. thank you

Firefox's, Firebug is your best friend.

The file is /components/com_k2/css/k2.css

Look at line #327 where it reads:
div.itemCommentsForm form input#submitCommentButton {display:block;margin:16px 0 0 0;padding:4px;border:1px solid #ccc;background:#eee;font-size:16px;}

I changed mine to background:#898989 and it shows up nicely.