.btn-danger {
    color: #fff;
    background-color: #3f3534;
    border-color: #3f3534;
}
.btn-danger:hover {
    color: #fff;
    background-color: #3f3534;
    border-color: #3f3534;
}
.text-danger {
    color: #3f3534;
}
.sombreado:hover {
    box-shadow: 0 10px 15px -3px #3f3534;
    transition: .5s;
}
.sombreado {
    box-shadow: 0 3px 15px -7px #3f3534;
    transition: .5s;
}
.fundo4 {
    background-color: #3f3534;
}
.cor3 {
    color: #3f3534;
}
.bs-callout-danger {
    border-left-color: #3f3534;
}
.bs-callout-danger h4 {
    color: #3f3534;
}