Hello,
Regarding the Mobile Menu Items color change, you can try out the Advanced Typography which can be found under the Dashboard > Theme Settings > Typography > Advanced > there you can select Mobile menu first level or Mobile menu second level as your selectors > and then you can define Color and Font Formatting for those under that: https://snipboard.io/LTMvE1.jpg
Regarding the Cart widget items color change specifically, you would need to try using the below Custom CSS code and paste it to Dashboard >> Theme Settings >> Custom CSS >> Global CSS section:
.widget.woocommerce.widget_shopping_cart .cart_list .mini_cart_item .cart-info .wd-entities-title {
color: #fff !important;
}
.widget.woocommerce.widget_shopping_cart .cart_list .mini_cart_item .cart-info .quantity .woocommerce-Price-amount {
color: #fff !important;
}
This CSS will change the color of the Product title and its Price.
Further, if you want to change the Colors of the Shopping Cart and Subtotal headings too under the Cart widget then use the following CSS at the same above told location:
.cart-widget-side .wd-heading .title {
color: #fff !important;
}
.shopping-cart-widget-footer .woocommerce-mini-cart__total strong {
color: #fff !important;
}
Hope this helps !
Best Regards