body {
    background-color: #fcefd9;
}

.navbar.bg-light {
    background-color: #f8e6c8 !important; /* чуть темнее */
}
footer.bg-light {
    background-color: #f8e6c8 !important;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #fcefd9;
}

main {
    flex: 1 0 auto;
}

footer {
    flex-shrink: 0;
}