nginx-proxy-manager/src/frontend/scss/custom.scss

$primary-color: #2bcbba;

.loader {
    color: $primary-color;
}

a {
    color: $primary-color;
}

a:hover {
    color: darken($primary-color, 10%);
}

.dropdown-item.active, .dropdown-item:active {
    background-color: $primary-color;
}

.custom-switch-input:checked ~ .custom-switch-indicator {
    background: $primary-color;
}

.min-100 {
    min-height: 100px;
}

.card-options .dropdown-menu a:not(.btn) {
    margin-left: 0;
}