<button  *ngIf="type=='none'" type="submit"  class="flex w-24 justify-center px-1 py-1.5 rounded" style="color: white; background-color: #A1A1A1;
;">{{titre}}</button>

<button *ngIf="type=='empty'" class="flex w-24 justify-center px-1 py-1.5 rounded" style="color: white;background-color: #07674D;" >{{titre}}</button>