Magento - Multiple values of the same attribute on a product -

I will have multiple values ​​for the same feature on a Magento product.

e.g. My shop has a black-white blanket when they choose white, then the customer should find this product, but whenever they choose white.

I noticed that for admin input, there is an option named "multiple selection", but it disappears for configurable products

So, for a product Can be multiple values ​​from the same property, but still use attribute for configurable products?

I hope someone can help me!