.btn-purple
{
    color: #fff !important;
    background-color: #6f42c1 !important;
    border-color:  #6f42c1 !important;
}
.btn-purple:hover
{
    color: #6f42c1 !important;
    background-color: #fff !important;
    border-color:  #6f42c1;
}
.btn-purple:focus
{
    box-shadow: 0 0 0 .25rem rgba(111,66,193,.25) !important;
}