Using css generator code in a custom website template for sale

Question

css

Somewhere their use is stipulated, usually they are online and not a word about commerce.
Part of their code

Answer 1

Rephrase the question, please. In any case, look for a license. Most likely you see the code on some GitHub or look at the source code of the page. In the first case, there must be a license, in the second - see copyright or license.