The antonyms for the phrase "keep dark" could be "reveal," "disclose," "expose," "unveil," or "let out." When people keep things dark, they intentionally keep them hidden or confidential. Conversely, when individuals reveal information, they share it with others instead of keeping it secret. Exposing ideas or facts is an antonym of keeping things dark because it uncovers or brings them to light. Unveiling something implies that it is no longer hidden or covered, while letting out something means sharing it with others. In any case, antonyms of "keep dark" suggest openness or transparency rather than secrecy.