.pulsante{
    display: block;
    box-shadow: 0 0 0 0 rgba(121, 29, 243, 1); /* altere a cor aqui */
    border-radius: 12px; /* altere o arrendondamento da borda aqui */
    -webkit-animation: pulsing 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    -moz-animation: pulsing 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    -ms-animation: pulsing 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    animation: pulsing 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    transition: all 300ms ease-in-out;
}

.pulsante:hover{
  -webkit-animation: none;
  -moz-animation: none;
  -ms-animation: none;
  animation: none;
}

@-webkit-keyframes pulsing{
  to{
    box-shadow: 0 0 0 20px rgba(121, 29, 243, 0); /* altere a cor aqui */
  }
}

@-moz-keyframes pulsing{
  to{
    box-shadow: 0 0 0 20px rgba(121, 29, 243, 0); /* altere a cor aqui */
  }
}

@-ms-keyframes pulsing{
  to{
    box-shadow: 0 0 0 20px rgba(121, 29, 243, 0); /* altere a cor aqui */
  }
}

@keyframes pulsing{
  to{
    box-shadow: 0 0 0 20px rgba(121, 29, 243, 0); /* altere a cor aqui */
  }
}