.user-647953, a[href*="647953"] { /* example-id, add or modify to your heart's content */
          background:   #f00;
          color:        #fff !important;  /* might need more/less !important tags 4U */
          font-weight:   700;
          padding:       0px 0.5em 0px 0.5em;
          border-radius: 4px;
}