Antonyms for the phrase "was within view" include "out of sight", "hidden", "obscured", "concealed", "beyond sight", "veiled", "covered", "camouflaged", "shrouded", "masked", and "invisible". These words indicate that something cannot be seen or is not immediately visible. In contrast to "was within view", these antonyms suggest an object or subject that is either purposely or unintentionally concealed from plain sight. It's worth noting that there are varying degrees of visibility in different contexts, and what may be hidden in one situation might be visible in another.