Hello,
1) Unfortunately, there is no option in Theme Settings to change the order of the variations. Because the variations are controlled by WooCommerce and our theme doesn’t influence it.
You can read the following article for further help:
https://devanswers.co/change-woocommerce-variations-attributes-custom-sort-order/
2) Please try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.
.woodmart-swatch:after {
border-color: white;
}
Regards.
Xtemos Studios