I have actualy “Colors” attributs where i have differents terms like “Red, Blue, Yellow…”.
I would like to put child terms like “Dark Blue” with “Blue” as parent attribut, but i can’t do that because i don’t have this functionality.
Yes, you are right: Woocommerce does not provide child attributes option and our theme cannot change that.
I doubt if it is possible to customize it. If you have a red t-short and different tints, you would better create a separate red variable product with tints that attribute.