Quantity per product variable

How can I set the stock quantity for each product variable?
I have a product with different colors and I want to set stock quantity for each of those colors.
For example, say you have a t-shirt in black, blue, and red.
You want to set the stock quantity in Woocommerce –
– black 3 pcs
– blue 4 pcs
– red 6 pcs

As you can see each of these colors has a different stock quantity

Thanks,
Menashay

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