hades/client/app/button/button.component.css

button
{
    border: none;
    background-color: #21D4FD;
   /* background-image: linear-gradient(45deg, #21D4FD 0%, #B721FF 100%);*/
    height: 40px;
    min-width: 150px;
    border-radius: 40px;
    margin:auto;
    display: block;
}