.act{ background:green; display: block; width: 50px; height: 50px; line-height: 50px; text-align: center; color: white; font-size: 30px; font-weight: bold; border-radius: 50%; -webkit-border-radius: 50%; text-decoration: none; transition: ease all 0.3s; position: fixed; right: 30px; bottom:30px; } .act-btn:hover{background: blue}