Template:User info/styles.css

.hr-rainbow {  width: 100%;
               height: 200px;
  background: linear-gradient(45deg, red, orange, yellow, green, blue, indigo, violet, red);
}

.Nickname { font-size: 2.6em; 
            line-height: 1.2; 
            font-family:'Helvetica Neue', Helvetica, 'Lucida Grande', Tahoma, Verdana, sans-serif;
}