The theme looks quite nice, however, it is missing one level of detail.
When a product is selected, it should display the product with an image list or carousel of available colors, once a color is selected, then ask for size / add to cart / add to wishlist.
Please let me know if you could add this, I would purchase the theme if this were there.
This would really be a nice feature but its implementation is not straightforward as there is no such built in functionality in the nopCommerce framework. It will require quite a lot of modifications to the nopCommerce framework that may go beyond the scope of a simple plugin. Making significant modifications to the core framework is something we try to avoid as this is hard to maintain and make updating to any new releases of nopCommerce really hard for us and our clients.
We are considering other options for achieving this by using product variants and modifications to the product template for more than one product variant. Should we come up with a relatively clean solution to this and decide to implement it for any of our subsequent releases we will let you now.
Hope this information is helpful!
Nop-Templates Support Team