Re: how do you change a foreground color?

You should read the Photoshop Help files at least once in a while.  This is basic Photoshop 101 stuff.

Double Click on the Foreground color icon (Tools panel).  That brings up the Color Picker, where you can select whatever color you want.

Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers: 

http://forums.adobe.com/thread/419981?tstart=0

Thanks!