N3 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ／です, so there are no forms to conjugate.
色が変わる
irogakawaruthe colour changesN3expression
Example sentences1
紅葉って秋になると色が変わるんだよね。
momiji tte aki ni naru to iro ga kawaru n da yo ne.
Maple leaves change colour when autumn comes, don't they? casual