How do I change color of footer menu and crediblity footer?

I am a beginner. My site is http://www.kssaustin.com. I am trying to insert code into CSS that will change the color of the footer menu and the Credibility footer. I tried

/*footer-menu font size */.footer-menu {font-size: 10px;} and .footer-menu a{color: #FFFFFF;}. neither worked. Help! Thanks