Hello,
Thanks for using our theme and for contacting us.
Custom CSS code can be used, for example, add the next code in Theme Options > Theme custom CSS > Global custom CSS:
.woocommerce-checkout .woocommerce-info a:not(.button) {
color: #b71b1b;
}
.woocommerce-checkout .woocommerce-form-coupon-toggle .woocommerce-info {
color: #3988fc;
}
.woocommerce-checkout .cart-order-details .shop_table .order-total th,
.woocommerce-checkout .cart-order-details .shop_table .order-total .amount {
color: red;
}
.woocommerce-checkout .order-review .cart_item .product-name {
color: #b71b1b;
}
Regards