Product with related variations

Hi, first time as a Woocomerce user here, so I beg your pardon if this may eventually sound too basic.

I have a product, a t-shirt. This t-shirt has 10 different sizes and 2 possible colors. Problem is the size is related to the color: 3 sizes are always white, while 7 are always red.

Should I create two different products? I couldn’t find a way to tell Woocommerce that the possibile colors are two but they are related to the size.

Any help is appreciated