css change link color in class

1a {
2  background-color: red;
3  color: white;
4  padding: 1em 1.5em;
5  text-decoration: none;
6  text-transform: uppercase;
7}

1a.register:link { color:#FFF; text-decoration:none; font-weight:normal; }
2a.register:visited { color: #FFF; text-decoration:none; font-weight:normal; }
3a.register:hover { color: #FFF; text-decoration:underline; font-weight:normal; }
4a.register:active { color: #FFF; text-decoration:none; font-weight:normal; }
5

1a {
2  background-color: red;
3  color: white;
4  padding: 1em 1.5em;
5  text-decoration: none;
6  text-transform: uppercase;