How to add color variation to product?

When vendor add new product in the Front End
I can't find the way how to add product variation such as

External Hard disk
Variation 1.) Color : Red, Blue, Black
Variation 2.) Capacity : 512GB,1TB,1.5TB

There are no problem if I add product from HikaShop Back End by myself,
but I can't find the way to let my Vendor set this variation in HikaMarket

Hi,

Variant edition is still in development in HikaMarket, it is one of our next big feature with Paypal adaptive.
We are finishing the implement of multi-shipping/payment and we will restart working on this feature just after.
So, the feature will not be available tomorrow but we want to release it as soon as possible. All I can say is that, it will be available in few months.
This feature is one of our main goals so it is a high priority for us.

Regards,