CSS3 - Border Color

#my_CSS3_id {
    text-align:center;
    margin:0 auto;
    height:50px;
    width:580px;
  border: 10px solid #c4c8cc;
  -moz-border-bottom-colors: #300 #600 #700 #800 #900 #A00;
  -moz-border-top-colors: #300 #600 #700 #800 #900 #A00;
  -moz-border-left-colors: #300 #600 #700 #800 #900 #A00;
  -moz-border-right-colors: #300 #600 #700 #800 #900 #A00;
}

#my_CSS3_id2 {
    text-align:center;
    margin:20px auto;
    height:50px;
    width:580px;
  border: 10px solid #c4c8cc;
  -moz-border-radius: 25px 0px;
  -moz-border-bottom-colors: #303 #404 #606 #808 #909 #A0A;
  -moz-border-top-colors: #303 #404 #606 #808 #909 #A0A;
  -moz-border-left-colors: #303 #404 #606 #808 #909 #A0A;
  -moz-border-right-colors: #303 #404 #606 #808 #909 #A0A;
}